Application: kmail (4.8 beta1)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 2.6.38.4-zen x86_64
Distribution (Platform): Gentoo Packages

-- Information about the crash:
Kmail crashes when I click Reply / Reply to All on any message. Tested with messages with or without attachments.

The crash can be reproduced every time.

-- Backtrace:
Application: KMail (kmail), signal: Illegal instruction
[Current thread is 1 (Thread 0x7ff192779760 (LWP 7188))]

Thread 3 (Thread 0x7ff176022700 (LWP 7205)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff1843174fd in WTF::TCMalloc_PageHeap::scavengerThread (this=<value optimized out>) at wtf/FastMalloc.cpp:2378
#2  0x00007ff184317609 in WTF::TCMalloc_PageHeap::runScavengerThread (context=0x7ff184acaf34) at wtf/FastMalloc.cpp:1497
#3  0x00007ff18d957dba in start_thread (arg=<value optimized out>) at pthread_create.c:301
#4  0x00007ff18fad902d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7ff175821700 (LWP 7206)):
#0  0x00007ff18fad0293 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007ff188216ee1 in g_main_context_poll (context=0x1e3bf50, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:3405
#2  g_main_context_iterate (context=0x1e3bf50, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:3087
#3  0x00007ff18821731e in g_main_context_iteration (context=0x1e3bf50, may_block=1) at gmain.c:3155
#4  0x00007ff190422c56 in QEventDispatcherGlib::processEvents (this=0x1e3baa0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007ff1903f6e12 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ff1903f7094 in QEventLoop::exec (this=0x7ff175820e20, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007ff19030cee4 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:498
#8  0x00007ff19030f765 in QThreadPrivate::start (arg=0x1e3b270) at thread/qthread_unix.cpp:331
#9  0x00007ff18d957dba in start_thread (arg=<value optimized out>) at pthread_create.c:301
#10 0x00007ff18fad902d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7ff192779760 (LWP 7188)):
[KCrash Handler]
#6  0x00007ff184295e52 in markedCells (this=0x7ff177055230) at ./wtf/StdLibExtras.h:76
#7  JSC::Heap::resizeBlocks (this=0x7ff177055230) at runtime/Collector.cpp:411
#8  0x00007ff183ba98a5 in WebCore::collect () at bindings/js/GCController.cpp:46
#9  0x00007ff183f584f6 in WebCore::ThreadTimers::sharedTimerFiredInternal (this=0x7ff177005810) at platform/ThreadTimers.cpp:112
#10 0x00007ff19040bc79 in QObject::event (this=0x1e358e0, e=<value optimized out>) at kernel/qobject.cpp:1181
#11 0x00007ff19090083c in QApplicationPrivate::notify_helper (this=0xfd2690, receiver=0x1e358e0, e=0x7fffed4b3380) at kernel/qapplication.cpp:4481
#12 0x00007ff19090539a in QApplication::notify (this=<value optimized out>, receiver=0x1e358e0, e=0x7fffed4b3380) at kernel/qapplication.cpp:4360
#13 0x00007ff1921818e8 in KApplication::notify (this=0x7fffed4b3760, receiver=0x1e358e0, event=0x7fffed4b3380) at /var/tmp/portage/kde-base/kdelibs-4.7.80/work/kdelibs-4.7.80/kdeui/kernel/kapplication.cpp:311
#14 0x00007ff1903f7acb in QCoreApplication::notifyInternal (this=0x7fffed4b3760, receiver=0x1e358e0, event=0x7fffed4b3380) at kernel/qcoreapplication.cpp:787
#15 0x00007ff190425589 in sendEvent (this=0xfd5fc0) at kernel/qcoreapplication.h:215
#16 QTimerInfoList::activateTimers (this=0xfd5fc0) at kernel/qeventdispatcher_unix.cpp:603
#17 0x00007ff190422534 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#18 0x00007ff188212c39 in g_main_dispatch (context=0xfd4db0) at gmain.c:2441
#19 g_main_context_dispatch (context=0xfd4db0) at gmain.c:3014
#20 0x00007ff188217178 in g_main_context_iterate (context=0xfd4db0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:3092
#21 0x00007ff18821731e in g_main_context_iteration (context=0xfd4db0, may_block=1) at gmain.c:3155
#22 0x00007ff190422c1a in QEventDispatcherGlib::processEvents (this=0xc97150, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#23 0x00007ff1909a6c86 in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007ff1903f6e12 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007ff1903f7094 in QEventLoop::exec (this=0x7fffed4b3630, flags=...) at kernel/qeventloop.cpp:201
#26 0x00007ff1903fb57b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#27 0x00000000004033d2 in main (argc=<value optimized out>, argv=<value optimized out>) at /var/tmp/portage/kde-base/kmail-4.7.80/work/kmail-4.7.80/kmail/main.cpp:145

Reported using DrKonqi