Mysterious crash

eschwartz · 08-11-2015, 06:26 PM

For some reason, calibre just started popping up with the following error message (sometimes dozens of times), then crashing after a short period of time:

Code:

calibre, version 2.34.0.r14.g7ee4c44
ERROR: Unhandled exception: <b>TypeError</b>:QProxyStyle.subElementRect(QStyle.SubElement, QStyleOption, QWidget): not enough arguments

calibre 2.34.0.r14.g7ee4c44  isfrozen: False is64bit: False
Linux-4.1.4-1-ARCH-i686-with-glibc2.0 Linux ('32bit', 'ELF')
('Linux', '4.1.4-1-ARCH', '#1 SMP PREEMPT Mon Aug 3 21:53:10 UTC 2015')
Python 2.7.10
Linux: ('', '', '')
Successfully initialized third party plugins: DeDRM && Kindle Collections && Open With && Quality Check && FanFicFare && KindleUnpack - The Plugin && Diaps Editing Toolbag && Overdrive Link && Goodreads Sync && Annotations && View Manager && Modify ePub && Overdrive Link
Traceback (most recent call last):
  File "/home/eschwartz/git/calibre/src/calibre/gui2/library/delegates.py", line 553, in paint
    rect = style.subElementRect(QStyle.SE_ItemViewItemDecoration, option)
TypeError: QProxyStyle.subElementRect(QStyle.SubElement, QStyleOption, QWidget): not enough arguments

I will note that a few hours ago it worked fine and I haven't changed anything on my system since.

PeterT · 08-11-2015, 07:03 PM

Running from source might be a factor here.....

eschwartz · 08-11-2015, 07:12 PM

Thank you for your wise elucidative remark. I can't believe I forgot I was running from source.

If it is a problem running from source, then it will probably be a problem later on in the official binary distributions. A number of PyQt5.5 compatibility issues were recently squelched that way, and similarly in calibre's history.

I am doing everything the recommended way -- running from source *shouldn't* be a problem. If it is anyway, Kovid will be interested at the very least.

BetterRed · 08-11-2015, 07:46 PM

Try Windows 10

Can you not install an instance of calibre that runs the binary out of the box. This would allow you to verify against a known good and thus eliminate the vagaries of running from source, i.e. what used to be a called regression testing!!

BR

eschwartz · 08-11-2015, 08:03 PM

Been there, done that. It works. calibre is just as reliable (in that respect) on linux as on Win10.

It even runs in development mode. Just the development install has that problem -- i.e. compiled against system resources.

I posted in the hope that I could maybe help calibre be forward-compatible sooner.

BetterRed · 08-11-2015, 08:30 PM

Q- would it not have been better to post this in the Development sub forum, I'll move it if you ask me nicely

eschwartz · 08-11-2015, 08:57 PM

Nope -- it's a bug report.

Development is for practical discussion of the code. If I was trying to fix it myself it might belong there.

kovidgoyal · 08-11-2015, 10:25 PM

PyQt 5.5 is annoying: https://github.com/kovidgoyal/calibr...bc67452b380fa7

eschwartz · 08-11-2015, 11:42 PM

Thanks for the fix. And at least it got caught before you ever shipped it.

I wonder though why I only started getting that now...
It happened every time I scrolled to the right.

kovidgoyal · 08-12-2015, 12:44 AM

Because it is in code for drawing custom comment columns and presumably you have a custom comment column somewhere to the right

08-11-2015, 08:03 PM	#5
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Been there, done that. It works. calibre is just as reliable (in that respect) on linux as on Win10. It even runs in development mode. Just the development install has that problem -- i.e. compiled against system resources. I posted in the hope that I could maybe help calibre be forward-compatible sooner. Last edited by eschwartz; 08-11-2015 at 08:55 PM. Reason: typo

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08-11-2015, 07:03 PM	#2
PeterT Grand Sorcerer Posts: 13,379 Karma: 78877538 Join Date: Nov 2007 Location: Toronto Device: Libra H2O, Libra Colour	Running from source might be a factor here.....

08-11-2015, 07:12 PM	#3
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Thank you for your wise elucidative remark. I can't believe I forgot I was running from source. If it is a problem running from source, then it will probably be a problem later on in the official binary distributions. A number of PyQt5.5 compatibility issues were recently squelched that way, and similarly in calibre's history. I am doing everything the recommended way -- running from source shouldn't be a problem. If it is anyway, Kovid will be interested at the very least.

08-11-2015, 07:46 PM	#4
BetterRed null operator (he/him) Posts: 21,662 Karma: 29711016 Join Date: Mar 2012 Location: Sydney Australia Device: none	Try Windows 10 Can you not install an instance of calibre that runs the binary out of the box. This would allow you to verify against a known good and thus eliminate the vagaries of running from source, i.e. what used to be a called regression testing!! BR

08-11-2015, 08:30 PM	#6
BetterRed null operator (he/him) Posts: 21,662 Karma: 29711016 Join Date: Mar 2012 Location: Sydney Australia Device: none	Q- would it not have been better to post this in the Development sub forum, I'll move it if you ask me nicely

08-11-2015, 08:57 PM	#7
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Nope -- it's a bug report. Development is for practical discussion of the code. If I was trying to fix it myself it might belong there.

08-11-2015, 10:25 PM	#8
kovidgoyal creator of calibre Posts: 45,253 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	PyQt 5.5 is annoying: https://github.com/kovidgoyal/calibr...bc67452b380fa7

08-11-2015, 11:42 PM	#9
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Thanks for the fix. And at least it got caught before you ever shipped it. I wonder though why I only started getting that now... It happened every time I scrolled to the right.

08-12-2015, 12:44 AM	#10
kovidgoyal creator of calibre Posts: 45,253 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Because it is in code for drawing custom comment columns and presumably you have a custom comment column somewhere to the right

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