# qgit segfaults after b237b00 3 messages from 2006-09-12 to 2006-09-13. Participants: Andreas Ericsson, Marco Costalba. Thread: https://gitlist.dev/t/5542 ## Andreas Ericsson, 2006-09-12 10:01 Subject: qgit segfaults after b237b00 Message-ID: <45068577.2020608@op5.se> URL: https://gitlist.dev/e/45068577.2020608%40op5.se ``` What subject says, really. Tried cold cache, hot cache, with and without qgit.dat, 3 different repos and 14 different repo-tips. Same result every time. A segfault before anything is drawn. Backtrace isn't very helpful (to me anyways): #0 0x00000000 in ?? () (gdb) bt #0 0x00000000 in ?? () #1 0x458525d2 in QGVector::insert () from /usr/lib/qt-3.3/lib/libqt-mt.so.3 #2 0x080aa19a in MainImpl::setupPixmaps (this=0x8191520, h=18) at /usr/lib/qt-3.3/include/qptrvector.h:67 #3 0x080b1ad1 in MainImpl::adjustFontSize (this=0x8191520, delta=0) at mainimpl.cpp:981 #4 0x080bae05 in MainImpl (this=0x8191520, cd=@0xbf92b094, p=0x0, name=0x0) at mainimpl.cpp:142 #5 0x080c4cdf in main (argc=0, argv=0x0) at qgit.cpp:14 (gdb) quit c++ is a scary thing to me, and my familiarity with QT is akin to the common cavemans grasp of piloting fighter-jets. I thus refrain from guessing where the problem might be. qgit-1.5.1 works wonderfully, so I've reset to that and am using it meanwhile. btw, kudos for a great tool. -- Andreas Ericsson andreas.ericsson@op5.se OP5 AB www.op5.se Tel: +46 8-230225 Fax: +46 8-230231 ``` ## Marco Costalba, 2006-09-12 17:39 Subject: Re: qgit segfaults after b237b00 Message-ID: URL: https://gitlist.dev/e/e5bfff550609121039h1ef25bc8y25186c321d555b8e%40mail.gmail.com In-Reply-To: <45068577.2020608@op5.se> ``` Hi Andreas, On 9/12/06, Andreas Ericsson wrote: > What subject says, really. Tried cold cache, hot cache, with and without > qgit.dat, 3 different repos and 14 different repo-tips. Same result > every time. A segfault before anything is drawn. > Sorry but I am not able to reproduce the bug here. Also from the trace I see that the segfault happens in a part of code that has not been touched by b237b00. And that _should_ not segfault in any way. The code there is the same of qgit-1.5.1 so perhaps could be some platform related issue, please write me Qt and gcc versions and processor used and, in case, do a complete rebuild with also reconfiguration (autoreconf -i). What about the current qgit HEAD (6128112f36) , could you reproduce the bug also there? >From the trace I see the segfault occurs in main view constructor, i.e. before to touch anything. So it is not related to a particular repository. > c++ is a scary thing to me, C++ is really scary not because we don't understand the code, but because we _think_ to understand what the code does ;-) Principle of least surprise is not exactly one of the design cornerstones of C++, at least for normal people sense of surprise. > > btw, kudos for a great tool. > Thanks to you for using it, and reporting bugs. Any suggestion is very appreciated! Marco ``` ## Andreas Ericsson, 2006-09-13 08:45 Subject: Re: qgit segfaults after b237b00 Message-ID: <4507C52A.6040902@op5.se> URL: https://gitlist.dev/e/4507C52A.6040902%40op5.se In-Reply-To: ``` Marco Costalba wrote: > Hi Andreas, > > On 9/12/06, Andreas Ericsson wrote: >> What subject says, really. Tried cold cache, hot cache, with and without >> qgit.dat, 3 different repos and 14 different repo-tips. Same result >> every time. A segfault before anything is drawn. >> > > Sorry but I am not able to reproduce the bug here. Also from the trace I > see > that the segfault happens in a part of code that has not been touched > by b237b00. > And that _should_ not segfault in any way. > > The code there is the same of qgit-1.5.1 so perhaps could be some > platform related issue, Probably, yes. Some more digging indicates it comes from trying to fetch the system default-font and setting it as the default application-font. > please write me Qt and gcc versions and processor used and, in case, > do a complete rebuild with also reconfiguration (autoreconf -i). > Naturally. Forgot it in the first mail *blush*. Mainly running Fedora Core 5, except for the kernel which I compile myself. nox!exon:~/git/qgit$ gcc --version gcc (GCC) 4.1.1 20060525 (Red Hat 4.1.1-1) Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. nox!exon:~/git/qgit$ rpm -q qt qt-3.3.6-0.4.fc5 nox!exon:~/git/qgit$ uname -a Linux nox.op5.se 2.6.18-rc6 #1 Wed Sep 6 15:41:35 CEST 2006 i686 i686 i386 GNU/Linux nox!exon:~/git/qgit$ Rebuilding with full autoreconf -i does indeed seem to solve the problem. I'm guessing some yum update changed the qt-version and the configure.cache kept the old settings so that it wasn't checked. Sorry for the noise. -- Andreas Ericsson andreas.ericsson@op5.se OP5 AB www.op5.se Tel: +46 8-230225 Fax: +46 8-230231 ```