All conversions end with error - Page 2

hyegeek · 08-13-2009, 03:54 PM

Anything else I can try to narrow down the problem?

kovidgoyal · 08-13-2009, 04:02 PM

Not unless you're willing to hack the source

hyegeek · 08-13-2009, 04:05 PM

I've already unpacked it looking for clues. The first thing I tried was changing my locale from unicode to C, but that does not seem to have helped.

Perhaps you can suggest where I might look and add debugging.

kovidgoyal · 08-13-2009, 04:09 PM

In the module calibre/gui2/tools.py and calibre/gui2/main.py is where the relevant code lives

hyegeek · 08-13-2009, 04:38 PM

I am not yet familiar enough with your code to know where to add debugging, but I think I know what is going on. When I run ebook-convert from the command line, it segfaults right after it finishes. Same as exiting from calibre. This is probably what makes the gui think it failed. If I can get to the bottom of the segfault, I will probably have my solution.

hyegeek · 08-13-2009, 04:42 PM

Just to make things real frustrating, running python through gdb prevents it from segfaulting, so I can't even try to figure out where things are going wrong.

hyegeek · 08-13-2009, 04:59 PM

OK. Problem solved. It appears that the segfault was a result of how all the scripts were being called. By changing things from calling python-wrapper to calling python directly, the segfaults are gone as are the errors on convert.

kovidgoyal · 08-14-2009, 12:29 PM

Interesting, what change was this exactly?

hyegeek · 08-14-2009, 12:32 PM

Quote:

Originally Posted by kovidgoyal

Interesting, what change was this exactly?

Under gentoo /usr/bin/python call's python-wrapper. By changing the first line of the scripts to

#!/usr/bin/python2

it called the version of python needed directly. There seems to be a big with how python-wrapper sets up the environment. The segfault was happening when python was cleaning up.

kovidgoyal · 08-14-2009, 12:45 PM

Hmm I use gentoo, don't see this behavior. Are you running the binary install of calibre?

hyegeek · 08-14-2009, 12:50 PM

I'm using the calibre package in portage. I unmasked the latest since the stable one is pretty old. It may be that my install of eselect-python is the problem. I have not dug in further after getting calibre to stop segfaulting. I did find a bug in bugs.gentoo.org about python-wrapper segfaulting, but I have not dug in far enough to find a solution.

kovidgoyal · 08-14-2009, 12:54 PM

Weird, oh well as long as it works

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08-13-2009, 03:54 PM	#16
hyegeek Groupie Posts: 171 Karma: 258122 Join Date: Dec 2007 Device: Ez Reader (hanlin v3)	Anything else I can try to narrow down the problem?

08-13-2009, 04:02 PM	#17
kovidgoyal creator of calibre Posts: 45,392 Karma: 27756918 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Not unless you're willing to hack the source

08-13-2009, 04:05 PM	#18
hyegeek Groupie Posts: 171 Karma: 258122 Join Date: Dec 2007 Device: Ez Reader (hanlin v3)	I've already unpacked it looking for clues. The first thing I tried was changing my locale from unicode to C, but that does not seem to have helped. Perhaps you can suggest where I might look and add debugging.

08-13-2009, 04:09 PM	#19
kovidgoyal creator of calibre Posts: 45,392 Karma: 27756918 Join Date: Oct 2006 Location: Mumbai, India Device: Various	In the module calibre/gui2/tools.py and calibre/gui2/main.py is where the relevant code lives

08-13-2009, 04:38 PM	#20
hyegeek Groupie Posts: 171 Karma: 258122 Join Date: Dec 2007 Device: Ez Reader (hanlin v3)	I am not yet familiar enough with your code to know where to add debugging, but I think I know what is going on. When I run ebook-convert from the command line, it segfaults right after it finishes. Same as exiting from calibre. This is probably what makes the gui think it failed. If I can get to the bottom of the segfault, I will probably have my solution.

08-13-2009, 04:42 PM	#21
hyegeek Groupie Posts: 171 Karma: 258122 Join Date: Dec 2007 Device: Ez Reader (hanlin v3)	Just to make things real frustrating, running python through gdb prevents it from segfaulting, so I can't even try to figure out where things are going wrong.

08-13-2009, 04:59 PM	#22
hyegeek Groupie Posts: 171 Karma: 258122 Join Date: Dec 2007 Device: Ez Reader (hanlin v3)	OK. Problem solved. It appears that the segfault was a result of how all the scripts were being called. By changing things from calling python-wrapper to calling python directly, the segfaults are gone as are the errors on convert.

08-14-2009, 12:29 PM	#23
kovidgoyal creator of calibre Posts: 45,392 Karma: 27756918 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Interesting, what change was this exactly?

08-14-2009, 12:45 PM	#25
kovidgoyal creator of calibre Posts: 45,392 Karma: 27756918 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Hmm I use gentoo, don't see this behavior. Are you running the binary install of calibre?

08-14-2009, 12:50 PM	#26
hyegeek Groupie Posts: 171 Karma: 258122 Join Date: Dec 2007 Device: Ez Reader (hanlin v3)	I'm using the calibre package in portage. I unmasked the latest since the stable one is pretty old. It may be that my install of eselect-python is the problem. I have not dug in further after getting calibre to stop segfaulting. I did find a bug in bugs.gentoo.org about python-wrapper segfaulting, but I have not dug in far enough to find a solution.

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08-14-2009, 12:54 PM	#27
kovidgoyal creator of calibre Posts: 45,392 Karma: 27756918 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Weird, oh well as long as it works