Bug 307028

Summary: KDevelop crashes after configuring a pruned project if Build/Run is chosen.
Product: [Applications] kdevelop Reporter: Jeremy W. Murphy <jeremy.william.murphy>
Component: Build tools: CMakeAssignee: kdevelop-bugs-null
Status: RESOLVED FIXED    
Severity: crash    
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: 4.3.0   
Platform: Compiled Sources   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: valgrind output

Description Jeremy W. Murphy 2012-09-19 09:19:46 UTC 
Application: kdevelop (4.3.90)
KDE Platform Version: 4.8.5 (4.8.5) (Compiled from sources)
Qt Version: 4.8.2
Operating System: Linux 3.4.10-gentoo-aufs3 x86_64
Distribution: "Gentoo Base System release 2.1"

-- Information about the crash:
- What I was doing when the application crashed:

I had just started KDevelop, the build directories were completely clean, and I hit Shift-F9 (run).  It looks like the project builds successfully and crashes at the point where it should run.

I can add in debugging information for other libraries if that helps.

The crash can be reproduced some of the time.

-- Backtrace:
Application: KDevelop (kdevelop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f52b4e8b780 (LWP 2917))]

Thread 13 (Thread 0x7f52ae4c1700 (LWP 2948)):
#0  pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
#1  0x00007f52c54ec52f in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f52c15ff71b in KDevelop::DUChainPrivate::CleanupThread::run (this=0x2cc0080) at /var/tmp/portage/dev-util/kdevplatform-1.3.90/work/kdevplatform-1.3.90/language/duchain/duchain.cpp:282
#3  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f52c3ef5ec6 in start_thread (arg=0x7f52ae4c1700) at pthread_create.c:305
#5  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 12 (Thread 0x7f5298450700 (LWP 3006)):
#0  0x00007f52c41e9eb3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f52be180b84 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f52be181041 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f52c561a4a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f52c55e9fd2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#5  0x00007f52c55ea227 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f52c54e9097 in QThread::exec() () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f52c3ef5ec6 in start_thread (arg=0x7f5298450700) at pthread_create.c:305
#9  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 11 (Thread 0x7f5297c4f700 (LWP 3007)):
#0  0x00007f52be180985 in ?? () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f52be181041 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f52c561a4a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#3  0x00007f52c55e9fd2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f52c55ea227 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#5  0x00007f52c54e9097 in QThread::exec() () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f52c3ef5ec6 in start_thread (arg=0x7f5297c4f700) at pthread_create.c:305
#8  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 10 (Thread 0x7f52970f7700 (LWP 3014)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f52c0989f42 in ?? () from /usr/lib64/qt4/libQtScript.so.4
#2  0x00007f52c0989f79 in ?? () from /usr/lib64/qt4/libQtScript.so.4
#3  0x00007f52c3ef5ec6 in start_thread (arg=0x7f52970f7700) at pthread_create.c:305
#4  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 9 (Thread 0x7f5295c8c700 (LWP 3038)):
#0  __pthread_mutex_unlock_usercnt (mutex=0x7f528c0009a8, decr=1) at pthread_mutex_unlock.c:52
#1  0x00007f52be17fbd9 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f52be180a09 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f52be181041 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f52c561a4a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#5  0x00007f52c55e9fd2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f52c55ea227 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f52c54e9097 in QThread::exec() () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f52c55c9def in ?? () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#10 0x00007f52c3ef5ec6 in start_thread (arg=0x7f5295c8c700) at pthread_create.c:305
#11 0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 8 (Thread 0x7f5287c30700 (LWP 3066)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f52baae563c in ?? () from /usr/lib64/qt4/libQtWebKit.so.4
#2  0x00007f52baae5769 in ?? () from /usr/lib64/qt4/libQtWebKit.so.4
#3  0x00007f52c3ef5ec6 in start_thread (arg=0x7f5287c30700) at pthread_create.c:305
#4  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 7 (Thread 0x7f528732f700 (LWP 3067)):
#0  0x00007f52c41e9eb3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f52be180b84 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f52be181041 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f52c561a4a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f52c55e9fd2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#5  0x00007f52c55ea227 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f52c54e9097 in QThread::exec() () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f52c3ef5ec6 in start_thread (arg=0x7f528732f700) at pthread_create.c:305
#9  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 6 (Thread 0x7f5285d10700 (LWP 3142)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f52c54ec5cb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f52bb4cbaab in ?? () from /usr/lib64/libthreadweaver.so.4
#3  0x00007f52bb4ce39b in ?? () from /usr/lib64/libthreadweaver.so.4
#4  0x00007f52bb4cd20f in ?? () from /usr/lib64/libthreadweaver.so.4
#5  0x00007f52bb4cd29b in ThreadWeaver::Thread::run() () from /usr/lib64/libthreadweaver.so.4
#6  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f52c3ef5ec6 in start_thread (arg=0x7f5285d10700) at pthread_create.c:305
#8  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 5 (Thread 0x7f528550f700 (LWP 3160)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f52c54ec5cb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f52bb4cbaab in ?? () from /usr/lib64/libthreadweaver.so.4
#3  0x00007f52bb4ce39b in ?? () from /usr/lib64/libthreadweaver.so.4
#4  0x00007f52bb4cd20f in ?? () from /usr/lib64/libthreadweaver.so.4
#5  0x00007f52bb4cd29b in ThreadWeaver::Thread::run() () from /usr/lib64/libthreadweaver.so.4
#6  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f52c3ef5ec6 in start_thread (arg=0x7f528550f700) at pthread_create.c:305
#8  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 4 (Thread 0x7f523f5f6700 (LWP 3814)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f52c54ec5cb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f52bb4cbaab in ?? () from /usr/lib64/libthreadweaver.so.4
#3  0x00007f52bb4ce39b in ?? () from /usr/lib64/libthreadweaver.so.4
#4  0x00007f52bb4cd20f in ?? () from /usr/lib64/libthreadweaver.so.4
#5  0x00007f52bb4cd29b in ThreadWeaver::Thread::run() () from /usr/lib64/libthreadweaver.so.4
#6  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f52c3ef5ec6 in start_thread (arg=0x7f523f5f6700) at pthread_create.c:305
#8  0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 3 (Thread 0x7f523edf5700 (LWP 3815)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f52c54ec5cb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f52bb4cbaab in ?? () from /usr/lib64/libthreadweaver.so.4
#3  0x00007f52bb4ce39b in ?? () from /usr/lib64/libthreadweaver.so.4
#4  0x00007f52bb4ce3b4 in ?? () from /usr/lib64/libthreadweaver.so.4
#5  0x00007f52bb4ce3b4 in ?? () from /usr/lib64/libthreadweaver.so.4
#6  0x00007f52bb4cd20f in ?? () from /usr/lib64/libthreadweaver.so.4
#7  0x00007f52bb4cd29b in ThreadWeaver::Thread::run() () from /usr/lib64/libthreadweaver.so.4
#8  0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007f52c3ef5ec6 in start_thread (arg=0x7f523edf5700) at pthread_create.c:305
#10 0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7f5284d0e700 (LWP 4195)):
#0  0x00007f52c41ec4e3 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f52c561731f in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timeval const*) () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f52c55c4b08 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#3  0x00007f52c55c63a5 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f52c55808fe in QProcess::waitForFinished(int) () from /usr/lib64/qt4/libQtCore.so.4
#5  0x00007f529b7216e2 in CMakeProjectVisitor::visit (this=0x7f5284d0caa0, exec=0x7f522400aa10) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/parser/cmakeprojectvisitor.cpp:1346
#6  0x00007f529b72cb5e in CMakeProjectVisitor::walk (this=0x7f5284d0caa0, fc=..., line=3, isClean=<optimized out>) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/parser/cmakeprojectvisitor.cpp:2219
#7  0x00007f529b72ec08 in CMakeProjectVisitor::visit (this=0x7f5284d0caa0, ifast=<optimized out>) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/parser/cmakeprojectvisitor.cpp:1307
#8  0x00007f529b72cb5e in CMakeProjectVisitor::walk (this=0x7f5284d0caa0, fc=..., line=2, isClean=<optimized out>) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/parser/cmakeprojectvisitor.cpp:2219
#9  0x00007f529b72ec08 in CMakeProjectVisitor::visit (this=0x7f5284d0caa0, ifast=<optimized out>) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/parser/cmakeprojectvisitor.cpp:1307
#10 0x00007f529b72cb5e in CMakeProjectVisitor::walk (this=0x7f5284d0caa0, fc=..., line=0, isClean=<optimized out>) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/parser/cmakeprojectvisitor.cpp:2219
#11 0x00007f529b73fe9c in CMakeParserUtils::includeScript (file=<optimized out>, parent=..., data=0x7f5224002f48, sourcedir=..., env=...) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/parser/cmakeparserutils.cpp:176
#12 0x00007f529616b4d3 in CMakeManager::includeScript (this=0x45e22b0, file=..., project=0x68e5740, dir=..., parent=...) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/cmakemanager.cpp:669
#13 0x00007f529616c01a in CMakeManager::initializeProject (this=0x45e22b0, project=0x68e5740) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/cmakemanager.cpp:549
#14 0x00007f529616f77e in CMakeManager::parse (this=0x45e22b0, item=0x2c50450) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectmanagers/cmake/cmakemanager.cpp:731
#15 0x00007f52c1bf6c49 in KDevelop::ImportProjectJobPrivate::import (this=0x637c070, folder=<optimized out>) at /var/tmp/portage/dev-util/kdevplatform-1.3.90/work/kdevplatform-1.3.90/project/importprojectjob.cpp:53
#16 0x00007f52c1bf68e6 in run (this=0x63c1f50) at /usr/include/qt4/QtCore/qtconcurrentrunbase.h:134
#17 QtConcurrent::RunFunctionTask<void>::run (this=0x63c1f50) at /usr/include/qt4/QtCore/qtconcurrentrunbase.h:125
#18 0x00007f52c54df8b2 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#19 0x00007f52c54ec0bb in ?? () from /usr/lib64/qt4/libQtCore.so.4
#20 0x00007f52c3ef5ec6 in start_thread (arg=0x7f5284d0e700) at pthread_create.c:305
#21 0x00007f52c41f2b4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f52b4e8b780 (LWP 2917)):
[KCrash Handler]
#6  0x00007f52946aca92 in MakeJob::computeBuildDir (this=0x446de50, item=0x7f52240e3420) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectbuilders/makebuilder/makejob.cpp:172
#7  0x00007f52946ae0ac in MakeJob::start (this=0x446de50) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectbuilders/makebuilder/makejob.cpp:100
#8  0x00007f52c6f5afc5 in KDevelop::RunController::registerJob (this=0x1d48350, job=0x446de50) at /var/tmp/portage/dev-util/kdevplatform-1.3.90/work/kdevplatform-1.3.90/shell/runcontroller.cpp:566
#9  0x00007f52c55ff291 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#10 0x00007f52c7541ab2 in KJob::result(KJob*) () from /usr/lib64/libkdecore.so.5
#11 0x00007f52c7541af0 in KJob::emitResult() () from /usr/lib64/libkdecore.so.5
#12 0x00007f5294496787 in CMakeJob::slotCompleted (this=0x71bf780) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/projectbuilders/cmakebuilder/cmakejob.cpp:127
#13 0x00007f52c55ff291 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#14 0x00007f52c55ff291 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#15 0x00007f52c5580aef in QProcess::finished(int, QProcess::ExitStatus) () from /usr/lib64/qt4/libQtCore.so.4
#16 0x00007f52c5588166 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#17 0x00007f52c55881ee in ?? () from /usr/lib64/qt4/libQtCore.so.4
#18 0x00007f52c55ff291 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#19 0x00007f52c564c2be in QSocketNotifier::activated(int) () from /usr/lib64/qt4/libQtCore.so.4
#20 0x00007f52c560861b in QSocketNotifier::event(QEvent*) () from /usr/lib64/qt4/libQtCore.so.4
#21 0x00007f52c4995a74 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#22 0x00007f52c499a843 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#23 0x00007f52c5e23f66 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#24 0x00007f52c55eb49c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007f52c5619aa7 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#26 0x00007f52be180672 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#27 0x00007f52be180e68 in ?? () from /usr/lib64/libglib-2.0.so.0
#28 0x00007f52be181041 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#29 0x00007f52c561a43f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#30 0x00007f52c4a385ee in ?? () from /usr/lib64/qt4/libQtGui.so.4
#31 0x00007f52c55e9fd2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#32 0x00007f52c55ea227 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#33 0x00007f52c55ef045 in QCoreApplication::exec() () from /usr/lib64/qt4/libQtCore.so.4
#34 0x0000000000410422 in main (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/dev-util/kdevelop-4.3.90/work/kdevelop-4.3.90/app/main.cpp:518

Possible duplicates by query: bug 258285.

Reported using DrKonqi
Comment 1 Jeremy W. Murphy 2012-09-20 12:38:19 UTC 
Good news is that I can reproduce the bug reliably now: Prune project, Build.  Crashes just after CMake finishes writing the build files, before actual build begins.  However, if I Prune then choose Configure, there is no crash.  It is something that happens at the moment when it changes over from configuring to building.
Comment 2 Jeremy W. Murphy 2012-09-20 12:40:08 UTC 
Created attachment 74050 [details]
valgrind output

It doesn't actually crash when I run it under valgrind, so I'm not sure if the output will help.
Comment 3 Milian Wolff 2012-10-04 23:09:46 UTC 
Hm Aleix - are you still using KDirWatch or not in the CMakeManager? Generally, this bt looks like a nasty eventloop racecondition or something like that :(
Comment 4 Jeremy W. Murphy 2012-10-05 00:15:21 UTC 
I switched over to using the latest git version and the bug is gone.  Let's hope that is actually fixed and not just hiding.  :)  I'll reopen if it reappears.