[Bug 112401] New: crash comparing two large directories

[William S Fulton]

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http://bugs.kde.org/show_bug.cgi?id=112401         
           Summary: crash comparing two large directories
           Product: kompare
           Version: 3.4
          Platform: SuSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: kompare-devel kde org
        ReportedBy: wsf fultondesigns co uk


Version:           3.4 (using KDE KDE 3.4.0)
Installed from:    SuSE RPMs
OS:                Linux

I often use kompare to diff large directories. Once in a while it will just crash with:

KCrash: Application 'kompare' crashing...

after hitting enter the command prompt returns, so I've used gdb to get more info and have attached a stack trace below. The diffs are comparing 2x 25MB directories. They are a bit large to include here, so please let me know if you need the directories, otherwise I can help debug this further.

Stack indicates possible out of memory situation - the diffs in the files are not that very much, so find this surprising. I got 256MB RAM.

William

william jaguar:~/swig/SWIG> kompare --version
Qt: 3.3.4
KDE: 3.4.0 Level "b"
Kompare: 3.4
william jaguar:~/swig/SWIG> cat /etc/SuSE-release
SuSE Linux 9.3 (i586)
VERSION = 9.3
william jaguar:~/swig/SWIG> gdb --args kompare ../goodts/csharpold26 Examples/test-suite/csharp
GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i586-suse-linux"...(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread_db.so.1".

(gdb) run
Starting program: /opt/kde3/bin/kompare ../goodts/csharpold26 Examples/test-suite/csharp
(no debugging symbols found)
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[Thread debugging using libthread_db enabled]
[New Thread 1097316736 (LWP 26118)]
(no debugging symbols found)
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Qt: gdb: -nograb added to command-line options.
         Use the -dograb option to enforce grabbing.

Program received signal SIGABRT, Aborted.
[Switching to Thread 1097316736 (LWP 26118)]
0xffffe410 in ?? ()
(gdb) where
#0  0xffffe410 in ?? ()
#1  0xbfffdf38 in ?? ()
#2  0x00000006 in ?? ()
#3  0x00006606 in ?? ()
#4  0x415872c1 in raise () from /lib/tls/libc.so.6
#5  0x41588b75 in abort () from /lib/tls/libc.so.6
#6  0x41514d95 in std::set_unexpected () from /usr/lib/libstdc++.so.5
#7  0x41514dd2 in std::terminate () from /usr/lib/libstdc++.so.5
#8  0x41514f12 in __cxa_throw () from /usr/lib/libstdc++.so.5
#9  0x41515153 in operator new () from /usr/lib/libstdc++.so.5
#10 0x4151522d in operator new[] () from /usr/lib/libstdc++.so.5
#11 0x41a7066a in Diff2::LevenshteinTable::LevenshteinTable () from /opt/kde3/lib/kde3/libkomparepart.so
#12 0x41a7072c in Diff2::Difference::Difference () from /opt/kde3/lib/kde3/libkomparepart.so
#13 0x41a78410 in Diff2::KompareModelList::blendFile () from /opt/kde3/lib/kde3/libkomparepart.so
#14 0x41a7887c in Diff2::KompareModelList::blendOriginalIntoModelList () from /opt/kde3/lib/kde3/libkomparepart.so
#15 0x41a792cf in Diff2::KompareModelList::slotDiffProcessFinished () from /opt/kde3/lib/kde3/libkomparepart.so
#16 0x41a7bfdd in Diff2::KompareModelList::qt_invoke () from /opt/kde3/lib/kde3/libkomparepart.so
#17 0x40d7ce7e in QObject::activate_signal () from /usr/lib/qt3/lib/libqt-mt.so.3
#18 0x40d7cfd3 in QObject::activate_signal_bool () from /usr/lib/qt3/lib/libqt-mt.so.3
#19 0x41a7bbd8 in KompareProcess::diffHasFinished () from /opt/kde3/lib/kde3/libkomparepart.so
#20 0x41a7bccd in KompareProcess::slotProcessExited () from /opt/kde3/lib/kde3/libkomparepart.so
#21 0x41a7bdb6 in KompareProcess::qt_invoke () from /opt/kde3/lib/kde3/libkomparepart.so
#22 0x40d7ce7e in QObject::activate_signal () from /usr/lib/qt3/lib/libqt-mt.so.3
#23 0x408cb532 in KProcess::processExited () from /opt/kde3/lib/libkdecore.so.4
#24 0x408cb5ac in KProcess::processHasExited () from /opt/kde3/lib/libkdecore.so.4
#25 0x4092472a in KProcessController::slotDoHousekeeping () from /opt/kde3/lib/libkdecore.so.4
#26 0x409247a8 in KProcessController::qt_invoke () from /opt/kde3/lib/libkdecore.so.4
#27 0x40d7ce7e in QObject::activate_signal () from /usr/lib/qt3/lib/libqt-mt.so.3
#28 0x40d7d4ad in QObject::activate_signal () from /usr/lib/qt3/lib/libqt-mt.so.3
#29 0x410d11f0 in QSocketNotifier::activated () from /usr/lib/qt3/lib/libqt-mt.so.3
#30 0x40d9ca70 in QSocketNotifier::event () from /usr/lib/qt3/lib/libqt-mt.so.3
#31 0x40d19d5f in QApplication::internalNotify () from /usr/lib/qt3/lib/libqt-mt.so.3
#32 0x40d1ba83 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#33 0x409a56b1 in KApplication::notify () from /opt/kde3/lib/libkdecore.so.4
#34 0x40d0de76 in QEventLoop::activateSocketNotifiers () from /usr/lib/qt3/lib/libqt-mt.so.3
#35 0x40cc7242 in QEventLoop::processEvents () from /usr/lib/qt3/lib/libqt-mt.so.3
#36 0x40d31e51 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#37 0x40d31c96 in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#38 0x40d1b94f in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#39 0x08059d3d in ?? ()
#40 0xbfffeea0 in ?? ()
#41 0xbfffee20 in ?? ()
#42 0xbfffee60 in ?? ()
#43 0x00000000 in ?? ()
#44 0x00000000 in ?? ()
#45 0x00000001 in ?? ()
#46 0x08066d60 in typeinfo name for QGList ()
#47 0x00000000 in ?? ()
#48 0x08066d94 in typeinfo name for QGList ()
#49 0x080660fd in typeinfo name for QGList ()
#50 0x4147e4dc in ?? ()
#51 0x40016ff4 in ?? () from /lib/ld-linux.so.2
#52 0x00000000 in ?? ()
#53 0x00000000 in ?? ()
#54 0xbfffee2c in ?? ()
---Type <return> to continue, or q <return> to quit---
#55 0x4000811f in do_lookup_x () from /lib/ld-linux.so.2
#56 0x41574e80 in __libc_start_main () from /lib/tls/libc.so.6
#57 0x08054351 in ?? ()
(gdb)