Getting kicked out of Editor

MerlinMama · 10-11-2019, 09:42 AM

Since updating to Calibre 4.1, I keep getting kicked out of the Editor (sometimes after nearly an hour of editing! -- I'm terrible at not saving until I'm finished).

Here is what I was doing when the editor just closed on me:

1) Paging down in a file <= This is the only one I might have moved my fingers and accidently hit delete, but I'm pretty sure I didn't
2) Near the end of my spell check
3) Clicked on "See What Changed" after doing a Find and Replace
4) Changing from one file to another

In each case, all corrections/changes I had done were lost (except when I added words to my personal dictionary, those stayed). None of these repeated after going back in and starting over. Only once did it happen twice on the same day, but not close in time.

Any ideas?

kovidgoyal · 10-11-2019, 12:18 PM

What OS? And what does get kicked out mean exactly?

MerlinMama · 10-11-2019, 01:04 PM

Quote:

Originally Posted by kovidgoyal

What OS? And what does get kicked out mean exactly?

I'm using Windows 10, and it just closes on me. If there are other things open in relation to Editor (spell check, see what's changed) they are also gone. If I reopen the book I was working on, all changes are gone, except for any words I added to a personal dictionary.

BetterRed · 10-11-2019, 04:58 PM

Quote:

Originally Posted by MerlinMama

I'm using Windows 10, and it just closes on me. If there are other things open in relation to Editor (spell check, see what's changed) they are also gone. If I reopen the book I was working on, all changes are gone, except for any words I added to a personal dictionary.

Personal dictionaries are in the calibre configuration folder they get written to as words are added.

How do you normally quit the editor ?

Have you done any keyboard shortcut customisations ?

By default the editor would quit without saving if you typed Ctrl+Q, Alt+Q.

Because I use Ctrl+Shift+Q globally for WordWeb, I null Ctrl+Q for Quit, and use Alt+Space, C instead.

BR

kovidgoyal · 10-11-2019, 09:28 PM

That sounds like a crash. Can you run the editor from a command prompt, like this:

calibre-debug -t

and post whatever output there is.

MerlinMama · 10-12-2019, 12:09 AM

Quote:

Originally Posted by BetterRed

Personal dictionaries are in the calibre configuration folder they get written to as words are added.

How do you normally quit the editor ?

Have you done any keyboard shortcut customisations ?

By default the editor would quit without saving if you typed Ctrl+Q, Alt+Q.

Because I use Ctrl+Shift+Q globally for WordWeb, I null Ctrl+Q for Quit, and use Alt+Space, C instead.

BR

Honestly, I usually quit the editor by hitting the X in the corner.

MerlinMama · 10-12-2019, 12:12 AM

Quote:

Originally Posted by kovidgoyal

That sounds like a crash. Can you run the editor from a command prompt, like this:

calibre-debug -t

and post whatever output there is.

I'll try to run it every time, and then if I get kicked out again, I'll post the results. Unless you want me to post even if it works fine?

kovidgoyal · 10-12-2019, 12:30 AM

Quote:

Originally Posted by MerlinMama

I'll try to run it every time, and then if I get kicked out again, I'll post the results. Unless you want me to post even if it works fine?

No only if it crashes.

ps67 · 10-12-2019, 02:39 AM

Hello, same problem with Kubuntu 64 bit 19.04. calibre 4.1
And it happens always (not always, most time) after 10 or 20 seconds:

Code:

Not controlling automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 100.968944099 x 100.852941176
physicalDpi: 102.453781513 x 102.358208955
Using calibre Qt style: True
Failed to initialize plugin: u'/home/ps/.config/calibre/plugins/KePub Input.zip'
Failed to initialize plugin: u'/home/ps/.config/calibre/plugins/KePub Output.zip'
Failed to initialize plugin: u'/home/ps/.config/calibre/plugins/KePub Metadata Reader.zip'
Failed to initialize plugin: u'/home/ps/.config/calibre/plugins/KePub Metadata Writer.zip'
Key u'Ctrl+Alt+Shift+E' for shortcut Run EpubCheck is already used by Edit 
Spans & Divs, ignoring
['kdialog', '--title', 'Scegli il libro', '--desktopfile', 'calibre-gui', '--attach', '69206025', '--getopenfilename', '/home/ps', 'Libri (*.epub *.azw3)']
Errore di segmentazione (core dump creato)

Error is in Italian but is a segmentation fault. I don't know if I should post something else.

Edit: I had the same issue with 4.0

I fixed that warning:

Code:

Key u'Ctrl+Alt+Shift+E' for shortcut Run EpubCheck is already used by Edit Spans & Divs, ignoring

I don't know if it was the cause of problems, I will use editor in the next days and I will make You know if it works well

Thank You for calibre.

kovidgoyal · 10-12-2019, 03:41 AM

No that's not likely to be the cause of the segfault. Get a backtrace but I am guessing this will show a crash somewhere inside Qt. You can get one with

echo bt | coredumpctl gdb

ps67 · 10-12-2019, 07:26 AM

This is the result of the command You indicated after a segfault:

Code:

echo bt | coredumpctl gdb 
           PID: 3642 (open_book)
           UID: 1000 (ps)
           GID: 1000 (ps)
        Signal: 11 (SEGV)
     Timestamp: Sat 2019-10-12 13:23:29 CEST (10s ago)
  Command Line: /opt/calibre/bin/calibre-debug -t
    Executable: /opt/calibre/bin/calibre-debug
 Control Group: /user.slice/user-1000.slice/session-4.scope
          Unit: session-4.scope
         Slice: user-1000.slice
       Session: 4
     Owner UID: 1000 (ps)
       Boot ID: 6649def83e6449198311f2bae0557538
    Machine ID: 511f79f717f34fabbda1f4c6b7101b7d
      Hostname: ps-Inspiron-3650
       Storage: /var/lib/systemd/coredump/core.open_book.1000.6649def83e6449198311f2bae0557538.3642.1570879409000000.lz4
       Message: Process 3642 (open_book) of user 1000 dumped core.
                
                Stack trace of thread 3642:
                #0  0x00007fba0cf0c779 _ZNK11QTextFormat14stringPropertyEi (libQt5Gui.so.5)
                #1  0x00007fba0d4268b7 n/a (QtGui.so)
                #2  0x00007fba17083a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #3  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #4  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #7  0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #8  0x00007fba16fda08c n/a (libpython2.7.so.1.0)
                #9  0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #10 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #11 0x00007fba0d87e6dd n/a (sip.so)
                #12 0x00007fba0d87e919 n/a (sip.so)
                #13 0x00007fba0b678fcb n/a (QtWidgets.so)
                #14 0x00007fba0b76cd9b n/a (QtWidgets.so)
                #15 0x00007fba0b006d3c _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #16 0x00007fba0b00f0a6 _ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #17 0x00007fba0b8b18be n/a (QtWidgets.so)
                #18 0x00007fba0dd21728 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
                #19 0x00007fba0b00cc31 _ZN12QApplication5eventEP6QEvent (libQt5Widgets.so.5)
                #20 0x00007fba0b8b1c0c n/a (QtWidgets.so)
                #21 0x00007fba17083a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #22 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #23 0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #24 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #25 0x00007fba16fda08c n/a (libpython2.7.so.1.0)
                #26 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #27 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #28 0x00007fba0d87e6dd n/a (sip.so)
                #29 0x00007fba0d87e919 n/a (sip.so)
                #30 0x00007fba0b678fcb n/a (QtWidgets.so)
                #31 0x00007fba0b8b1adb n/a (QtWidgets.so)
                #32 0x00007fba0b006d3c _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #33 0x00007fba0b00e3d0 _ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #34 0x00007fba0b8b18be n/a (QtWidgets.so)
                #35 0x00007fba0dd21728 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
                #36 0x00007fba0dd7be39 _ZN14QTimerInfoList14activateTimersEv (libQt5Core.so.5)
                #37 0x00007fba0dd7c6c1 n/a (libQt5Core.so.5)
                #38 0x00007fba0ea6fdb7 g_main_context_dispatch (libglib-2.0.so.0)
                #39 0x00007fba0ea700c8 n/a (libglib-2.0.so.0)
                #40 0x00007fba0ea702ac g_main_context_iteration (libglib-2.0.so.0)
                #41 0x00007fba0dd7ca8f _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5)
                #42 0x00007fba0dd1fbd2 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
                #43 0x00007fba0dd28c34 _ZN16QCoreApplication4execEv (libQt5Core.so.5)
                #44 0x00007fba0b82630b n/a (QtWidgets.so)
                #45 0x00007fba17083a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #46 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #47 0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #48 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #49 0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #50 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #51 0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #52 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #53 0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #54 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #55 0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #56 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #57 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #58 0x00007fba175a2529 execute_python_entrypoint (libcalibre-launcher.so)
                #59 0x0000000000400635 n/a (calibre-debug)
                #60 0x00007fba173b8b6b __libc_start_main (libc.so.6)
                #61 0x0000000000400669 n/a (calibre-debug)
                
                Stack trace of thread 3647:
                #0  0x00007fba16f64086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba16f64178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007fba170bebb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007fba170c4522 n/a (libpython2.7.so.1.0)
                #4  0x00007fba17083a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007fba16ffad55 n/a (libpython2.7.so.1.0)
                #11 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #12 0x00007fba1707dbd2 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #13 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #14 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #15 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #16 0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #17 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #18 0x00007fba16fda08c n/a (libpython2.7.so.1.0)
                #19 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #20 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #21 0x00007fba170c4922 n/a (libpython2.7.so.1.0)
                #22 0x00007fba170be907 n/a (libpython2.7.so.1.0)
                #23 0x00007fba16f5b182 start_thread (libpthread.so.0)
                #24 0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3649:
                #0  0x00007fba16f64086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba16f64178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007fba170bebb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007fba170c4522 n/a (libpython2.7.so.1.0)
                #4  0x00007fba17083a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #11 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #12 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #13 0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #14 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #15 0x00007fba16fda08c n/a (libpython2.7.so.1.0)
                #16 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #17 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #18 0x00007fba170c4922 n/a (libpython2.7.so.1.0)
                #19 0x00007fba170be907 n/a (libpython2.7.so.1.0)
                #20 0x00007fba16f5b182 start_thread (libpthread.so.0)
                #21 0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3648:
                #0  0x00007fba16f64086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba16f64178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007fba170bebb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007fba170c4522 n/a (libpython2.7.so.1.0)
                #4  0x00007fba17083a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007fba16ffad55 n/a (libpython2.7.so.1.0)
                #11 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #12 0x00007fba1707dbd2 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #13 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #14 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #15 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #16 0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #17 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #18 0x00007fba16fda08c n/a (libpython2.7.so.1.0)
                #19 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #20 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #21 0x00007fba170c4922 n/a (libpython2.7.so.1.0)
                #22 0x00007fba170be907 n/a (libpython2.7.so.1.0)
                #23 0x00007fba16f5b182 start_thread (libpthread.so.0)
                #24 0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3663:
                #0  0x00007fba174a6047 __GI___select (libc.so.6)
                #1  0x00007fba03e25b33 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #4  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3653:
                #0  0x00007fba16f61916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed053a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0fdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed1072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8e011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3652:
                #0  0x00007fba174afe3f epoll_wait (libc.so.6)
                #1  0x00007fba041e2c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba041e0d53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed606a n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e6015d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e9d674 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03ea0e58 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3654:
                #0  0x00007fba16f61916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed053a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0fdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed1072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8e011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3667:
                #0  0x00007fba16f613bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed043e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0ee3 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed102f n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e3f473 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e6015d n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03ea0d59 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3664:
                #0  0x00007fba16f61916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed053a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0fdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed1072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8e011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3674:
                #0  0x00007fba16f64086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba16f64178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007fba170bebb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007fba170c4522 n/a (libpython2.7.so.1.0)
                #4  0x00007fba17083a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #11 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #12 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #13 0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #14 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #15 0x00007fba16fda08c n/a (libpython2.7.so.1.0)
                #16 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #17 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #18 0x00007fba170c4922 n/a (libpython2.7.so.1.0)
                #19 0x00007fba170be907 n/a (libpython2.7.so.1.0)
                #20 0x00007fba16f5b182 start_thread (libpthread.so.0)
                #21 0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3655:
                #0  0x00007fba174a3729 __GI___poll (libc.so.6)
                #1  0x00007fba0395ea1a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ea0be4 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #5  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3660:
                #0  0x00007fba174733ba __GI___waitpid (libc.so.6)
                #1  0x00007fba03ecd5d7 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ece616 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ece759 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #6  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3671:
                #0  0x00007fba1749efb4 __GI___libc_read (libc.so.6)
                #1  0x00007fb9fd993a2e n/a (_multiprocessing.so)
                #2  0x00007fb9fd993c80 n/a (_multiprocessing.so)
                #3  0x00007fba17082f1d PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #4  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #5  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #6  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #7  0x00007fba17082404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #8  0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #9  0x00007fba16ffad55 n/a (libpython2.7.so.1.0)
                #10 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #11 0x00007fba1707dbd2 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #12 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #13 0x00007fba17082525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #14 0x00007fba17085fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #15 0x00007fba16ffac6c n/a (libpython2.7.so.1.0)
                #16 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #17 0x00007fba16fda08c n/a (libpython2.7.so.1.0)
                #18 0x00007fba16fc82b3 PyObject_Call (libpython2.7.so.1.0)
                #19 0x00007fba1707c087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #20 0x00007fba170c4922 n/a (libpython2.7.so.1.0)
                #21 0x00007fba170be907 n/a (libpython2.7.so.1.0)
                #22 0x00007fba16f5b182 start_thread (libpthread.so.0)
                #23 0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3708:
                #0  0x00007fba16f61916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed053a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0fdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed1072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8dc75 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3665:
                #0  0x00007fba16f61916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed053a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0fdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed1072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8e011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3661:
                #0  0x00007fba174afe3f epoll_wait (libc.so.6)
                #1  0x00007fba041e2c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba041e0d53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed5fc1 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e6015d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03ea0d59 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #8  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3672:
                #0  0x00007fba16f613bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed043e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0ee3 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed102f n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89805 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8e011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e464 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3668:
                #0  0x00007fba16f61916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed053a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0fdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed1072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8dc75 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3666:
                #0  0x00007fba16f613bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed043e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba04b22fb5 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ea0be4 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #6  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3670:
                #0  0x00007fba174afe3f epoll_wait (libc.so.6)
                #1  0x00007fba041e2c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba041e0d53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed5fc1 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e6015d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03ea0d59 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #8  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3669:
                #0  0x00007fba16f61916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed053a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0fdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03e3f481 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e6015d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03ea0d59 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #8  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3646:
                #0  0x00007fba174a3729 __GI___poll (libc.so.6)
                #1  0x00007fba1264b917 n/a (libxcb.so.1)
                #2  0x00007fba1264d53a xcb_wait_for_event (libxcb.so.1)
                #3  0x00007fb9fa529a18 n/a (libQt5XcbQpa.so.5)
                #4  0x00007fba0db3875e n/a (libQt5Core.so.5)
                #5  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #6  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3682:
                #0  0x00007fba174a3729 __GI___poll (libc.so.6)
                #1  0x00007fba0ea6ffd3 n/a (libglib-2.0.so.0)
                #2  0x00007fba0ea702ac g_main_context_iteration (libglib-2.0.so.0)
                #3  0x00007fba0dd7ca8f _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5)
                #4  0x00007fba0dd1fbd2 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
                #5  0x00007fba0db37114 _ZN7QThread4execEv (libQt5Core.so.5)
                #6  0x00007fb9fa444b05 n/a (libQt5DBus.so.5)
                #7  0x00007fba0db3875e n/a (libQt5Core.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3687:
                #0  0x00007fba16f613bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007fba03ed043e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba03ed0ee3 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed102f n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e89805 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba03e8e011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03e8e424 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)
                
                Stack trace of thread 3662:
                #0  0x00007fba174afe3f epoll_wait (libc.so.6)
                #1  0x00007fba041e2c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007fba041e0d53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007fba03ed606a n/a (libQt5WebEngineCore.so.5)
                #4  0x00007fba03e6015d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007fba035af644 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007fba03ea0e58 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007fba03ed34f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007fba16f5b182 start_thread (libpthread.so.0)
                #9  0x00007fba174afb1f __clone (libc.so.6)

GNU gdb (Ubuntu 8.2.91.20190405-0ubuntu3) 8.2.91.20190405-git
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /opt/calibre/bin/calibre-debug...
(No debugging symbols found in /opt/calibre/bin/calibre-debug)

warning: core file may not match specified executable file.
[New LWP 3642]
[New LWP 3647]
[New LWP 3649]
[New LWP 3648]
[New LWP 3663]
[New LWP 3653]
[New LWP 3652]
[New LWP 3654]
[New LWP 3667]
[New LWP 3664]
[New LWP 3674]
[New LWP 3655]
[New LWP 3660]
[New LWP 3671]
[New LWP 3708]
[New LWP 3665]
[New LWP 3661]
[New LWP 3672]
[New LWP 3668]
[New LWP 3666]
[New LWP 3670]
[New LWP 3669]
[New LWP 3646]
[New LWP 3682]
[New LWP 3687]
[New LWP 3662]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/opt/calibre/bin/calibre-debug -t'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fba0cf0c779 in QTextFormat::stringProperty(int) const () from /opt/calibre/lib/libQt5Gui.so.5
[Current thread is 1 (Thread 0x7fba16df4740 (LWP 3642))]
(gdb) #0  0x00007fba0cf0c779 in QTextFormat::stringProperty(int) const () from /opt/calibre/lib/libQt5Gui.so.5
#1  0x00007fba0d4268b7 in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtGui.so
#2  0x00007fba17083a35 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#3  0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#4  0x00007fba17082404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#5  0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#6  0x00007fba16ffac6c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#7  0x00007fba16fc82b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#8  0x00007fba16fda08c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#9  0x00007fba16fc82b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#10 0x00007fba1707c087 in PyEval_CallObjectWithKeywords () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#11 0x00007fba0d87e6dd in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#12 0x00007fba0d87e919 in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#13 0x00007fba0b678fcb in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#14 0x00007fba0b76cd9b in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#15 0x00007fba0b006d3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#16 0x00007fba0b00f0a6 in QApplication::notify(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#17 0x00007fba0b8b18be in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#18 0x00007fba0dd21728 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Core.so.5
#19 0x00007fba0b00cc31 in QApplication::event(QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#20 0x00007fba0b8b1c0c in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#21 0x00007fba17083a35 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#22 0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#23 0x00007fba16ffac6c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#24 0x00007fba16fc82b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#25 0x00007fba16fda08c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#26 0x00007fba16fc82b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#27 0x00007fba1707c087 in PyEval_CallObjectWithKeywords () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#28 0x00007fba0d87e6dd in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#29 0x00007fba0d87e919 in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#30 0x00007fba0b678fcb in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
--Type <RET> for more, q to quit, c to continue without paging--#31 0x00007fba0b8b1adb in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#32 0x00007fba0b006d3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#33 0x00007fba0b00e3d0 in QApplication::notify(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#34 0x00007fba0b8b18be in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#35 0x00007fba0dd21728 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Core.so.5
#36 0x00007fba0dd7be39 in QTimerInfoList::activateTimers() () from /opt/calibre/lib/libQt5Core.so.5
#37 0x00007fba0dd7c6c1 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#38 0x00007fba0ea6fdb7 in g_main_context_dispatch () from /opt/calibre/lib/libglib-2.0.so.0
#39 0x00007fba0ea700c8 in ?? () from /opt/calibre/lib/libglib-2.0.so.0
#40 0x00007fba0ea702ac in g_main_context_iteration () from /opt/calibre/lib/libglib-2.0.so.0
#41 0x00007fba0dd7ca8f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /opt/calibre/lib/libQt5Core.so.5
#42 0x00007fba0dd1fbd2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/calibre/lib/libQt5Core.so.5
#43 0x00007fba0dd28c34 in QCoreApplication::exec() () from /opt/calibre/lib/libQt5Core.so.5
#44 0x00007fba0b82630b in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#45 0x00007fba17083a35 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#46 0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#47 0x00007fba17082404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#48 0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#49 0x00007fba17082404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#50 0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#51 0x00007fba17082404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#52 0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#53 0x00007fba17082404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#54 0x00007fba17085fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#55 0x00007fba16ffac6c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#56 0x00007fba16fc82b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#57 0x00007fba1707c087 in PyEval_CallObjectWithKeywords () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#58 0x00007fba175a2529 in execute_python_entrypoint () from /opt/calibre/lib/libcalibre-launcher.so
#59 0x0000000000400635 in ?? ()
#60 0x00007fba173b8b6b in __libc_start_main (main=0x400600, argc=2, argv=0x7ffff570e5b8, init=<optimized out>, 
--Type <RET> for more, q to quit, c to continue without paging--    fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff570e5a8) at ../csu/libc-start.c:308
#61 0x0000000000400669 in ?? ()
(gdb) quit

kovidgoyal · 10-12-2019, 09:48 PM

Yeah as I suspected that's a crash inside Qt, something to do with syntax highlighting. Likely trigerred by the newer Qt version in calibre 4. Is there something unusual about your systems? calibre plugins? Qt plugins? Hard to debug without being able to reproduce.

Can you try running the editor like this:

CALIBRE_CONFIG_DIRECTORY=/tmp/cc calibre-debug -t

this will run the editor with all default config settings and no plugins. Does it still crash?

kovidgoyal · 10-12-2019, 10:02 PM

Oh and see https://bugs.launchpad.net/calibre/+bug/1846760

ps67 · 10-13-2019, 02:24 PM

Yes, the issue is still there:

Code:

ps@ps-Inspiron-3650:~$ CALIBRE_CONFIG_DIRECTORY=/tmp/cc calibre-debug -t
Not controlling automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 100.968944099 x 100.852941176
physicalDpi: 102.453781513 x 102.358208955
Using calibre Qt style: True
['kdialog', '--title', 'Scegli il libro', '--desktopfile', 'calibre-gui', '--attach', '65011730', '--getopenfilename', '/home/ps', 'Libri (*.epub *.azw3)']
Errore di segmentazione (core dump creato)
ps@ps-Inspiron-3650:~$ echo bt | coredumpctl gdb                        
           PID: 2497 (open_book)
           UID: 1000 (ps)
           GID: 1000 (ps)
        Signal: 11 (SEGV)
     Timestamp: Sun 2019-10-13 20:20:28 CEST (26s ago)
  Command Line: /opt/calibre/bin/calibre-debug -t
    Executable: /opt/calibre/bin/calibre-debug
 Control Group: /user.slice/user-1000.slice/session-3.scope
          Unit: session-3.scope
         Slice: user-1000.slice
       Session: 3
     Owner UID: 1000 (ps)
       Boot ID: c9f59298119748c0825364741d8e325d
    Machine ID: 511f79f717f34fabbda1f4c6b7101b7d
      Hostname: ps-Inspiron-3650
       Storage: /var/lib/systemd/coredump/core.open_book.1000.c9f59298119748c0825364741d8e325d.2497.1570990828000000.lz4
       Message: Process 2497 (open_book) of user 1000 dumped core.
                
                Stack trace of thread 2497:
                #0  0x00007f6b0524c779 _ZNK11QTextFormat14stringPropertyEi (libQt5Gui.so.5)
                #1  0x00007f6b057668b7 n/a (QtGui.so)
                #2  0x00007f6b0fae2a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #3  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #4  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #7  0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #8  0x00007f6b0fa3908c n/a (libpython2.7.so.1.0)
                #9  0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #10 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #11 0x00007f6b05bbe6dd n/a (sip.so)
                #12 0x00007f6b05bbe919 n/a (sip.so)
                #13 0x00007f6b039cffcb n/a (QtWidgets.so)
                #14 0x00007f6b03ac3d9b n/a (QtWidgets.so)
                #15 0x00007f6b0335dd3c _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #16 0x00007f6b033660a6 _ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #17 0x00007f6b03c088be n/a (QtWidgets.so)
                #18 0x00007f6b06061728 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
                #19 0x00007f6b03363c31 _ZN12QApplication5eventEP6QEvent (libQt5Widgets.so.5)
                #20 0x00007f6b03c08c0c n/a (QtWidgets.so)
                #21 0x00007f6b0fae2a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #22 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #23 0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #24 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #25 0x00007f6b0fa3908c n/a (libpython2.7.so.1.0)
                #26 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #27 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #28 0x00007f6b05bbe6dd n/a (sip.so)
                #29 0x00007f6b05bbe919 n/a (sip.so)
                #30 0x00007f6b039cffcb n/a (QtWidgets.so)
                #31 0x00007f6b03c08adb n/a (QtWidgets.so)
                #32 0x00007f6b0335dd3c _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #33 0x00007f6b033653d0 _ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5)
                #34 0x00007f6b03c088be n/a (QtWidgets.so)
                #35 0x00007f6b06061728 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5)
                #36 0x00007f6b060bbe39 _ZN14QTimerInfoList14activateTimersEv (libQt5Core.so.5)
                #37 0x00007f6b060bc6c1 n/a (libQt5Core.so.5)
                #38 0x00007f6b06defdb7 g_main_context_dispatch (libglib-2.0.so.0)
                #39 0x00007f6b06df00c8 n/a (libglib-2.0.so.0)
                #40 0x00007f6b06df02ac g_main_context_iteration (libglib-2.0.so.0)
                #41 0x00007f6b060bca8f _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5)
                #42 0x00007f6b0605fbd2 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
                #43 0x00007f6b06068c34 _ZN16QCoreApplication4execEv (libQt5Core.so.5)
                #44 0x00007f6b03b7d30b n/a (QtWidgets.so)
                #45 0x00007f6b0fae2a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #46 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #47 0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #48 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #49 0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #50 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #51 0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #52 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #53 0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #54 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #55 0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #56 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #57 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #58 0x00007f6b10001529 execute_python_entrypoint (libcalibre-launcher.so)
                #59 0x0000000000400635 n/a (calibre-debug)
                #60 0x00007f6b0fe17b6b __libc_start_main (libc.so.6)
                #61 0x0000000000400669 n/a (calibre-debug)
                
                Stack trace of thread 2502:
                #0  0x00007f6b0f9c3086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6b0f9c3178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007f6b0fb1dbb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007f6b0fb23522 n/a (libpython2.7.so.1.0)
                #4  0x00007f6b0fae2a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007f6b0fa59d55 n/a (libpython2.7.so.1.0)
                #11 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #12 0x00007f6b0fadcbd2 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #13 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #14 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #15 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #16 0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #17 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #18 0x00007f6b0fa3908c n/a (libpython2.7.so.1.0)
                #19 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #20 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #21 0x00007f6b0fb23922 n/a (libpython2.7.so.1.0)
                #22 0x00007f6b0fb1d907 n/a (libpython2.7.so.1.0)
                #23 0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #24 0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2509:
                #0  0x00007f6b0f9c0916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e53a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46efdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc46f072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc427831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc42c011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc42c3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2504:
                #0  0x00007f6b0f9c3086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6b0f9c3178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007f6b0fb1dbb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007f6b0fb23522 n/a (libpython2.7.so.1.0)
                #4  0x00007f6b0fae2a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #11 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #12 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #13 0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #14 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #15 0x00007f6b0fa3908c n/a (libpython2.7.so.1.0)
                #16 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #17 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #18 0x00007f6b0fb23922 n/a (libpython2.7.so.1.0)
                #19 0x00007f6b0fb1d907 n/a (libpython2.7.so.1.0)
                #20 0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #21 0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2503:
                #0  0x00007f6b0f9c3086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6b0f9c3178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007f6b0fb1dbb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007f6b0fb23522 n/a (libpython2.7.so.1.0)
                #4  0x00007f6b0fae2a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007f6b0fa59d55 n/a (libpython2.7.so.1.0)
                #11 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #12 0x00007f6b0fadcbd2 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #13 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #14 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #15 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #16 0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #17 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #18 0x00007f6b0fa3908c n/a (libpython2.7.so.1.0)
                #19 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #20 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #21 0x00007f6b0fb23922 n/a (libpython2.7.so.1.0)
                #22 0x00007f6b0fb1d907 n/a (libpython2.7.so.1.0)
                #23 0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #24 0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2507:
                #0  0x00007f6b0ff0ee3f epoll_wait (libc.so.6)
                #1  0x00007f6afc780c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc77ed53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc47406a n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc3fe15d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc43b674 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc43ee58 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2523:
                #0  0x00007f6b0ff0ee3f epoll_wait (libc.so.6)
                #1  0x00007f6afc780c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc77ed53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc473fc1 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc3fe15d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc43ed59 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #8  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2517:
                #0  0x00007f6b0ff05047 __GI___select (libc.so.6)
                #1  0x00007f6afc3c3b33 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #4  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2510:
                #0  0x00007f6b0ff02729 __GI___poll (libc.so.6)
                #1  0x00007f6afbefca1a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc43ebe4 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #5  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2508:
                #0  0x00007f6b0f9c0916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e53a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46efdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc46f072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc427831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc42c011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc42c3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2524:
                #0  0x00007f6b0f9c03bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e43e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46eee3 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc46f02f n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc3dd473 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc3fe15d n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc43ed59 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2522:
                #0  0x00007f6b0f9c0916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e53a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46efdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc3dd481 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc3fe15d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc43ed59 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #8  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2516:
                #0  0x00007f6b0ff0ee3f epoll_wait (libc.so.6)
                #1  0x00007f6afc780c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc77ed53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc473fc1 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc3fe15d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc43ed59 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #8  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2529:
                #0  0x00007f6b0f9c3086 futex_abstimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6b0f9c3178 __new_sem_wait_slow (libpthread.so.0)
                #2  0x00007f6b0fb1dbb8 PyThread_acquire_lock (libpython2.7.so.1.0)
                #3  0x00007f6b0fb23522 n/a (libpython2.7.so.1.0)
                #4  0x00007f6b0fae2a35 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #5  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #6  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #7  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #8  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #9  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #10 0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #11 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #12 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #13 0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #14 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #15 0x00007f6b0fa3908c n/a (libpython2.7.so.1.0)
                #16 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #17 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #18 0x00007f6b0fb23922 n/a (libpython2.7.so.1.0)
                #19 0x00007f6b0fb1d907 n/a (libpython2.7.so.1.0)
                #20 0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #21 0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2515:
                #0  0x00007f6b0fed23ba __GI___waitpid (libc.so.6)
                #1  0x00007f6afc46b5d7 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46c616 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc46c759 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #6  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2528:
                #0  0x00007f6b0fefdfb4 __GI___libc_read (libc.so.6)
                #1  0x00007f6af62e0a2e n/a (_multiprocessing.so)
                #2  0x00007f6af62e0c80 n/a (_multiprocessing.so)
                #3  0x00007f6b0fae1f1d PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #4  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #5  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #6  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #7  0x00007f6b0fae1404 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #8  0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #9  0x00007f6b0fa59d55 n/a (libpython2.7.so.1.0)
                #10 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #11 0x00007f6b0fadcbd2 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #12 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #13 0x00007f6b0fae1525 PyEval_EvalFrameEx (libpython2.7.so.1.0)
                #14 0x00007f6b0fae4fbc PyEval_EvalCodeEx (libpython2.7.so.1.0)
                #15 0x00007f6b0fa59c6c n/a (libpython2.7.so.1.0)
                #16 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #17 0x00007f6b0fa3908c n/a (libpython2.7.so.1.0)
                #18 0x00007f6b0fa272b3 PyObject_Call (libpython2.7.so.1.0)
                #19 0x00007f6b0fadb087 PyEval_CallObjectWithKeywords (libpython2.7.so.1.0)
                #20 0x00007f6b0fb23922 n/a (libpython2.7.so.1.0)
                #21 0x00007f6b0fb1d907 n/a (libpython2.7.so.1.0)
                #22 0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #23 0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2518:
                #0  0x00007f6b0f9c0916 futex_reltimed_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e53a n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46efdd n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc46f072 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc427831 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc42c011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc42c3e4 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2501:
                #0  0x00007f6b0ff02729 __GI___poll (libc.so.6)
                #1  0x00007f6b04ad4917 n/a (libxcb.so.1)
                #2  0x00007f6b04ad653a xcb_wait_for_event (libxcb.so.1)
                #3  0x00007f6af3549a18 n/a (libQt5XcbQpa.so.5)
                #4  0x00007f6b05e7875e n/a (libQt5Core.so.5)
                #5  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #6  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2537:
                #0  0x00007f6b0ff02729 __GI___poll (libc.so.6)
                #1  0x00007f6b06deffd3 n/a (libglib-2.0.so.0)
                #2  0x00007f6b06df02ac g_main_context_iteration (libglib-2.0.so.0)
                #3  0x00007f6b060bca8f _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5)
                #4  0x00007f6b0605fbd2 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5)
                #5  0x00007f6b05e77114 _ZN7QThread4execEv (libQt5Core.so.5)
                #6  0x00007f6af3464b05 n/a (libQt5DBus.so.5)
                #7  0x00007f6b05e7875e n/a (libQt5Core.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2519:
                #0  0x00007f6b0ff0ee3f epoll_wait (libc.so.6)
                #1  0x00007f6afc780c54 n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc77ed53 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc47406a n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc3fe15d n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afbb4d644 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc43ee58 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2521:
                #0  0x00007f6b0f9c03bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e43e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afd0c0fb5 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc43ebe4 n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #6  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2526:
                #0  0x00007f6b0f9c03bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e43e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46eee3 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc46f02f n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc427805 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc42c011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc42c464 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)
                
                Stack trace of thread 2542:
                #0  0x00007f6b0f9c03bb futex_wait_cancelable (libpthread.so.0)
                #1  0x00007f6afc46e43e n/a (libQt5WebEngineCore.so.5)
                #2  0x00007f6afc46eee3 n/a (libQt5WebEngineCore.so.5)
                #3  0x00007f6afc46f02f n/a (libQt5WebEngineCore.so.5)
                #4  0x00007f6afc427805 n/a (libQt5WebEngineCore.so.5)
                #5  0x00007f6afc42c011 n/a (libQt5WebEngineCore.so.5)
                #6  0x00007f6afc42c424 n/a (libQt5WebEngineCore.so.5)
                #7  0x00007f6afc4714f4 n/a (libQt5WebEngineCore.so.5)
                #8  0x00007f6b0f9ba182 start_thread (libpthread.so.0)
                #9  0x00007f6b0ff0eb1f __clone (libc.so.6)

GNU gdb (Ubuntu 8.2.91.20190405-0ubuntu3) 8.2.91.20190405-git
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /opt/calibre/bin/calibre-debug...
(No debugging symbols found in /opt/calibre/bin/calibre-debug)

warning: core file may not match specified executable file.
[New LWP 2497]
[New LWP 2502]
[New LWP 2509]
[New LWP 2504]
[New LWP 2503]
[New LWP 2507]
[New LWP 2523]
[New LWP 2517]
[New LWP 2510]
[New LWP 2508]
[New LWP 2524]
[New LWP 2522]
[New LWP 2516]
[New LWP 2529]
[New LWP 2515]
[New LWP 2528]
[New LWP 2518]
[New LWP 2501]
[New LWP 2537]
[New LWP 2519]
[New LWP 2521]
[New LWP 2526]
[New LWP 2542]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/opt/calibre/bin/calibre-debug -t'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f6b0524c779 in QTextFormat::stringProperty(int) const () from /opt/calibre/lib/libQt5Gui.so.5
[Current thread is 1 (Thread 0x7f6b0f853740 (LWP 2497))]
(gdb) #0  0x00007f6b0524c779 in QTextFormat::stringProperty(int) const () from /opt/calibre/lib/libQt5Gui.so.5
#1  0x00007f6b057668b7 in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtGui.so
#2  0x00007f6b0fae2a35 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#3  0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#4  0x00007f6b0fae1404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#5  0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#6  0x00007f6b0fa59c6c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#7  0x00007f6b0fa272b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#8  0x00007f6b0fa3908c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#9  0x00007f6b0fa272b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#10 0x00007f6b0fadb087 in PyEval_CallObjectWithKeywords () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#11 0x00007f6b05bbe6dd in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#12 0x00007f6b05bbe919 in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#13 0x00007f6b039cffcb in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#14 0x00007f6b03ac3d9b in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#15 0x00007f6b0335dd3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#16 0x00007f6b033660a6 in QApplication::notify(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#17 0x00007f6b03c088be in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#18 0x00007f6b06061728 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Core.so.5
#19 0x00007f6b03363c31 in QApplication::event(QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#20 0x00007f6b03c08c0c in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#21 0x00007f6b0fae2a35 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#22 0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#23 0x00007f6b0fa59c6c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#24 0x00007f6b0fa272b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#25 0x00007f6b0fa3908c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#26 0x00007f6b0fa272b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#27 0x00007f6b0fadb087 in PyEval_CallObjectWithKeywords () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#28 0x00007f6b05bbe6dd in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#29 0x00007f6b05bbe919 in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/sip.so
#30 0x00007f6b039cffcb in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
--Type <RET> for more, q to quit, c to continue without paging--#31 0x00007f6b03c08adb in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#32 0x00007f6b0335dd3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#33 0x00007f6b033653d0 in QApplication::notify(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Widgets.so.5
#34 0x00007f6b03c088be in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#35 0x00007f6b06061728 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /opt/calibre/lib/libQt5Core.so.5
#36 0x00007f6b060bbe39 in QTimerInfoList::activateTimers() () from /opt/calibre/lib/libQt5Core.so.5
#37 0x00007f6b060bc6c1 in ?? () from /opt/calibre/lib/libQt5Core.so.5
#38 0x00007f6b06defdb7 in g_main_context_dispatch () from /opt/calibre/lib/libglib-2.0.so.0
#39 0x00007f6b06df00c8 in ?? () from /opt/calibre/lib/libglib-2.0.so.0
#40 0x00007f6b06df02ac in g_main_context_iteration () from /opt/calibre/lib/libglib-2.0.so.0
#41 0x00007f6b060bca8f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /opt/calibre/lib/libQt5Core.so.5
#42 0x00007f6b0605fbd2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/calibre/lib/libQt5Core.so.5
#43 0x00007f6b06068c34 in QCoreApplication::exec() () from /opt/calibre/lib/libQt5Core.so.5
#44 0x00007f6b03b7d30b in ?? () from /opt/calibre/lib/python2.7/site-packages/PyQt5/QtWidgets.so
#45 0x00007f6b0fae2a35 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#46 0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#47 0x00007f6b0fae1404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#48 0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#49 0x00007f6b0fae1404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#50 0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#51 0x00007f6b0fae1404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#52 0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#53 0x00007f6b0fae1404 in PyEval_EvalFrameEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#54 0x00007f6b0fae4fbc in PyEval_EvalCodeEx () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#55 0x00007f6b0fa59c6c in ?? () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#56 0x00007f6b0fa272b3 in PyObject_Call () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#57 0x00007f6b0fadb087 in PyEval_CallObjectWithKeywords () from /opt/calibre/lib/../lib/libpython2.7.so.1.0
#58 0x00007f6b10001529 in execute_python_entrypoint () from /opt/calibre/lib/libcalibre-launcher.so
#59 0x0000000000400635 in ?? ()
#60 0x00007f6b0fe17b6b in __libc_start_main (main=0x400600, argc=2, argv=0x7fff9fb91c78, init=<optimized out>, 
--Type <RET> for more, q to quit, c to continue without paging--    fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff9fb91c68) at ../csu/libc-start.c:308
#61 0x0000000000400669 in ?? ()
(gdb) quit
ps@ps-Inspiron-3650:~$

I could not answer before because I was not Home.

ps67 · 10-13-2019, 02:29 PM

Quote:

Originally Posted by kovidgoyal

Oh and see https://bugs.launchpad.net/calibre/+bug/1846760

May be the same problem, I use the wheel of the mouse, for example to go down in css file, but 4.1 did not solve the issue.

I tried to work avoiding the wheel, and for some Minuit it worked. Then I used the wheel and after 2 or 3 Minuit I obtained segfault. But it is not really a scientific proof.

edit: also without using wheel it crashes, it was not the wheel.

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10-11-2019, 09:42 AM	#1
MerlinMama Evangelist Posts: 482 Karma: 32554 Join Date: May 2014 Location: Canada Device: Kobo Sage	Getting kicked out of Editor Since updating to Calibre 4.1, I keep getting kicked out of the Editor (sometimes after nearly an hour of editing! -- I'm terrible at not saving until I'm finished). Here is what I was doing when the editor just closed on me: 1) Paging down in a file <= This is the only one I might have moved my fingers and accidently hit delete, but I'm pretty sure I didn't 2) Near the end of my spell check 3) Clicked on "See What Changed" after doing a Find and Replace 4) Changing from one file to another In each case, all corrections/changes I had done were lost (except when I added words to my personal dictionary, those stayed). None of these repeated after going back in and starting over. Only once did it happen twice on the same day, but not close in time. Any ideas?

10-11-2019, 12:18 PM	#2
kovidgoyal creator of calibre Posts: 43,857 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	What OS? And what does get kicked out mean exactly?

10-11-2019, 09:28 PM	#5
kovidgoyal creator of calibre Posts: 43,857 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That sounds like a crash. Can you run the editor from a command prompt, like this: calibre-debug -t and post whatever output there is.

10-12-2019, 03:41 AM	#10
kovidgoyal creator of calibre Posts: 43,857 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No that's not likely to be the cause of the segfault. Get a backtrace but I am guessing this will show a crash somewhere inside Qt. You can get one with echo bt \| coredumpctl gdb

10-12-2019, 09:48 PM	#12
kovidgoyal creator of calibre Posts: 43,857 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Yeah as I suspected that's a crash inside Qt, something to do with syntax highlighting. Likely trigerred by the newer Qt version in calibre 4. Is there something unusual about your systems? calibre plugins? Qt plugins? Hard to debug without being able to reproduce. Can you try running the editor like this: CALIBRE_CONFIG_DIRECTORY=/tmp/cc calibre-debug -t this will run the editor with all default config settings and no plugins. Does it still crash?

10-12-2019, 10:02 PM	#13
kovidgoyal creator of calibre Posts: 43,857 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Oh and see https://bugs.launchpad.net/calibre/+bug/1846760