Control: tags + moreinfo Hi Hartmut,
On Mon, Jul 10, 2017 at 06:18:31PM +0200, Hartmut Buhrmester wrote: > Package: calibre > Version: 2.75.1+dfsg-1 > > Other relevant packages: > > calibre-bin 2.75.1+dfsg-1 > python2.7 2.7.13-2 > libqt5webkit5 5.7.1+dfsg-1 > python-pyqt5.qtwebkit 5.7+dfsg-5 > > For debugging I also installed (for i386): > > calibre-bin-dbgsym 2.75.1+dfsg-1 > python2.7-dbg 2.7.13-2 > libqt5webkit5-dbg 5.7.1+dfsg-1 > python-pyqt5.qtwebkit-dbg 5.7+dfsg-5 > > Kernel: Linux debian 4.9.0-3-686-pae #1 SMP Debian 4.9.30-2+deb9u2 > (2017-06-26) i686 GNU/Linux > > > The ebook-viewer from the package calibre crashes with an "illegal > instruction", while reading ebooks of type *.epub. This happens, for > example, with the ebooks from Project Gutenberg at > https://www.gutenberg.org/wiki/Main_Page . > > The crash does not happen immediately; the application starts normally and I > can open an ebook of type *.epub. I can also browse through the pages. But > when I start reading and stay at two subsequent page for some time, then the > ebook-viewer may suddenly quit with an illegal instruction. > > It seems, that the ebook-viewer regularly recalculates the current reading > position and safes it to a file. The next time it will reopen the file at > the same position. But sometimes it seems to crash at this point. > > The ebook-viewer may also crash, when the application window is closed. This > crash may get unnoticed during normal usage. But in the debugger, I still > get the message: "Program terminated with signal SIGILL, Illegal > instruction." > > I suspect, that the cause is again the recalculation of the reading > position, to save it to a file. > Would you please confirm if this issue also affects calibre from stretch-backports (3.31.0+dfsg-1~bpo9+1) or alternatively from sid (3.39.1+dfsg-1). > > When the ebook-viewer is started in a terminal, I get the error "Illegal > instruction". > > hb1@debian:~$ ebook-viewer > Illegal instruction > hb1@debian:~$ > > > The logfiles /var/log/messages, /var/log/syslog und /var/log/kern.log > contain these messages: > > > Jun 29 22:52:30 debian kernel: [ 1529.008213] traps: ebook-viewer[1350] > > trap invalid opcode ip:a84cae95 sp:bfa65160 error:0 > > Jun 29 23:08:31 debian kernel: [ 2490.015276] traps: ebook-viewer[1407] > > trap invalid opcode ip:abf0e9a9 sp:bfaa6890 error:0 > > Jun 29 23:09:58 debian kernel: [ 2577.010756] traps: ebook-viewer[1440] > > trap invalid opcode ip:a8e34989 sp:bfeac550 error:0 > > Jun 29 23:28:20 debian kernel: [ 3679.067235] traps: ebook-viewer[1454] > > trap invalid opcode ip:aac0e9a9 sp:bf9d16d0 error:0 > I was not able to reproduce this ebook-viewer failure with 3.39.1+dfsg-1. > > I created two backtraces with gdb, using the packages calibre-bin-dbgsym, > python2.7-dbg, libqt5webkit5-dbg, and python-pyqt5.qtwebkit-dbg. > > Since /usr/bin/ebook-viewer is not a binary file, but a Python script, I > used the approach: > > - start ebook-viewer in a terminal > - get the process id of /usr/bin/python2.7 /usr/bin/ebook-viewer > - start gdb > - attach gdb to the process id > - let the application continue > - load an ebook in the ebook-viewer > - read the ebook, until it crashes > - get a backtrace > Thank you for the backtraces and high-quality bug report! :-D Based on a quick scan of the backtrace I wonder if this might have been a libqt5webkit5 or a jquery bug (from the ancient unmaintained bundled copy of jquery 1.x). If it's the latter, it's an upstream issue. I thought about unbundling it, and switching to Debian's libjs-jquery 3.x, but someone would have had to check if Calibre used obsolete methods no longer supported in jquery 3.x... Sadly I didn't have the time/knowledge necessary to check this in time for Buster/Debian 10. Cheers, Nicholas
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