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Qt Creator randomly crashing at Debugger::Internal::QmlInspectorAgent::onResult()
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I've been struggling with Qt Creator crashing randomly while I'm debugging my app on MacOS Mojave. It looks as if my QML code is at fault. And it always crashes at a call to Debugger::Internal::QmlInspectorAgent::onResult(). I've attached an abbreviated .crash file. Any ideas how to pinpoint where the bug is in my QML?
Process: Qt Creator [91583] Path: /Users/USER/*/Qt Creator.app/Contents/MacOS/Qt Creator Identifier: org.qt-project.qtcreator Version: 4.9 (4.9.2) Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: Qt Creator [91583] User ID: 501 Date/Time: 2019-07-01 23:05:27.183 -0700 OS Version: Mac OS X 10.14.3 (18D109) Report Version: 12 Anonymous UUID: D99EC8E1-68B5-D97A-50E8-7CC874649B85 Time Awake Since Boot: 2000000 seconds System Integrity Protection: enabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000001d00000001 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [91583] VM Regions Near 0x1d00000001: MALLOC_LARGE 0000000130af6000-0000000130c76000 [ 1536K] rw-/rwx SM=PRV --> MALLOC_NANO 0000600000000000-0000600020000000 [512.0M] rw-/rwx SM=PRV Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libDebugger.dylib 0x0000000116e325ed Debugger::Internal::QmlInspectorAgent::onResult(unsigned int, QVariant const&, QByteArray const&) + 1565 1 org.qt-project.QtCore 0x0000000110e4a6ab QMetaObject::activate(QObject*, int, int, void**) + 2219 2 libQmlDebug.4.9.2.dylib 0x0000000117122b26 QmlDebug::BaseEngineDebugClient::result(unsigned int, QVariant const&, QByteArray const&) + 70 3 libQmlDebug.4.9.2.dylib 0x00000001171133eb QmlDebug::BaseEngineDebugClient::messageReceived(QByteArray const&) + 859 4 libQmlDebug.4.9.2.dylib 0x000000011711dc69 QmlDebug::QmlDebugConnection::protocolReadyRead() + 585 5 org.qt-project.QtCore 0x0000000110e4a6ab QMetaObject::activate(QObject*, int, int, void**) + 2219 6 org.qt-project.QtCore 0x0000000110e4a6ab QMetaObject::activate(QObject*, int, int, void**) + 2219 7 libQmlDebug.4.9.2.dylib 0x0000000117118ffd QmlDebug::QPacketProtocolPrivate::readyToRead() + 93 8 org.qt-project.QtCore 0x0000000110e4a6ab QMetaObject::activate(QObject*, int, int, void**) + 2219 9 org.qt-project.QtNetwork 0x0000000110b7ae85 QAbstractSocketPrivate::canReadNotification() + 229 10 org.qt-project.QtNetwork 0x0000000110b90aa0 QReadNotifier::event(QEvent*) + 32 11 org.qt-project.QtWidgets 0x000000010ffc4c3d QApplicationPrivate::notify_helper(QObject*, QEvent*) + 269 12 org.qt-project.QtWidgets 0x000000010ffc6042 QApplication::notify(QObject*, QEvent*) + 594 13 org.qt-project.QtCore 0x0000000110e196e4 QCoreApplication::notifyInternal2(QObject*, QEvent*) + 212 14 org.qt-project.QtCore 0x0000000110e6c677 qt_mac_socket_callback(__CFSocket*, unsigned long, __CFData const*, void const*, void*) + 167 15 com.apple.CoreFoundation 0x00007fff3d7e0e9d __CFSocketPerformV0 + 985 16 com.apple.CoreFoundation 0x00007fff3d747395 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 17 com.apple.CoreFoundation 0x00007fff3d74733b __CFRunLoopDoSource0 + 108 18 com.apple.CoreFoundation 0x00007fff3d72add1 __CFRunLoopDoSources0 + 195 19 com.apple.CoreFoundation 0x00007fff3d72a37a __CFRunLoopRun + 1219 20 com.apple.CoreFoundation 0x00007fff3d729c64 CFRunLoopRunSpecific + 463 21 com.apple.HIToolbox 0x00007fff3c9c0ab5 RunCurrentEventLoopInMode + 293 22 com.apple.HIToolbox 0x00007fff3c9c07eb ReceiveNextEventCommon + 618 23 com.apple.HIToolbox 0x00007fff3c9c0568 _BlockUntilNextEventMatchingListInModeWithFilter + 64 24 com.apple.AppKit 0x00007fff3ac7b363 _DPSNextEvent + 997 25 com.apple.AppKit 0x00007fff3ac7a102 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1362 26 com.apple.AppKit 0x00007fff3ac74165 -[NSApplication run] + 699 27 libqcocoa.dylib 0x000000011178bb7b QCocoaEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 2955 28 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 29 org.qt-project.QtCore 0x0000000110e19cf2 QCoreApplication::exec() + 130 30 org.qt-project.qtcreator 0x000000010fcd0b01 main + 15217 31 libdyld.dylib 0x00007fff6a97ced9 start + 1 Thread 1:: com.apple.CFSocket.private 0 libsystem_kernel.dylib 0x00007fff6aabd5aa __select + 10 1 com.apple.CoreFoundation 0x00007fff3d758c13 __CFSocketManager + 639 2 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 3 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 4 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 2:: Qt bearer thread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6f83a qt_safe_poll(pollfd*, unsigned int, timespec const*) + 90 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 3:: QThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 4:: QThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 5:: QThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 6:: QNetworkAccessManager thread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 7:: com.apple.NSEventThread 0 libsystem_kernel.dylib 0x00007fff6aab617a mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff6aab66d0 mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff3d72afde __CFRunLoopServiceMachPort + 337 3 com.apple.CoreFoundation 0x00007fff3d72a52d __CFRunLoopRun + 1654 4 com.apple.CoreFoundation 0x00007fff3d729c64 CFRunLoopRunSpecific + 463 5 com.apple.AppKit 0x00007fff3ac83f89 _NSEventThread + 160 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 8:: QmlJSEditor::Internal::SemanticInfoUpdater 0 libsystem_kernel.dylib 0x00007fff6aab97de __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff6ab73593 _pthread_cond_wait + 724 2 org.qt-project.QtCore 0x0000000110c5ad6b QWaitConditionPrivate::wait(QDeadlineTimer) + 59 3 org.qt-project.QtCore 0x0000000110c5accc QWaitCondition::wait(QMutex*, QDeadlineTimer) + 108 4 libQmlJSEditor.dylib 0x000000011d792da2 QmlJSEditor::Internal::SemanticInfoUpdater::run() + 162 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 9:: QFileInfoGatherer 0 libsystem_kernel.dylib 0x00007fff6aab97de __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff6ab73593 _pthread_cond_wait + 724 2 org.qt-project.QtCore 0x0000000110c5ad6b QWaitConditionPrivate::wait(QDeadlineTimer) + 59 3 org.qt-project.QtCore 0x0000000110c5accc QWaitCondition::wait(QMutex*, QDeadlineTimer) + 108 4 org.qt-project.QtWidgets 0x00000001101ef752 QFileInfoGatherer::run() + 130 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 10:: QQmlThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtQml 0x00000001114cb219 QQmlThreadPrivate::run() + 57 6 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 7 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 8 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 9 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 11:: QFileInfoGatherer 0 libsystem_kernel.dylib 0x00007fff6aab97de __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff6ab73593 _pthread_cond_wait + 724 2 org.qt-project.QtCore 0x0000000110c5ad6b QWaitConditionPrivate::wait(QDeadlineTimer) + 59 3 org.qt-project.QtCore 0x0000000110c5accc QWaitCondition::wait(QMutex*, QDeadlineTimer) + 108 4 org.qt-project.QtWidgets 0x00000001101ef752 QFileInfoGatherer::run() + 130 5 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 6 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 7 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 8 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 12:: QQmlThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtQml 0x00000001114cb219 QQmlThreadPrivate::run() + 57 6 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 7 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 8 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 9 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 13:: QQmlThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtQml 0x00000001114cb219 QQmlThreadPrivate::run() + 57 6 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 7 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 8 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 9 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 14:: QQmlThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtQml 0x00000001114cb219 QQmlThreadPrivate::run() + 57 6 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 7 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 8 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 9 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 15:: QQmlThread 0 libsystem_kernel.dylib 0x00007fff6aabe2ee poll + 10 1 org.qt-project.QtCore 0x0000000110e6fa40 qt_safe_poll(pollfd*, unsigned int, timespec const*) + 608 2 org.qt-project.QtCore 0x0000000110e71237 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 903 3 org.qt-project.QtCore 0x0000000110e14cff QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 431 4 org.qt-project.QtCore 0x0000000110c515fc QThread::exec() + 140 5 org.qt-project.QtQml 0x00000001114cb219 QQmlThreadPrivate::run() + 57 6 org.qt-project.QtCore 0x0000000110c52573 QThreadPrivate::start(void*) + 323 7 libsystem_pthread.dylib 0x00007fff6ab70305 _pthread_body + 126 8 libsystem_pthread.dylib 0x00007fff6ab7326f _pthread_start + 70 9 libsystem_pthread.dylib 0x00007fff6ab6f415 thread_start + 13 Thread 16: 0 libsystem_pthread.dylib 0x00007fff6ab6f3f8 start_wqthread + 0 1 ??? 0x0000000000001a0b 0 + 6667 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000001d00000001 rbx: 0x00006000073a25c0 rcx: 0x0000000000000050 rdx: 0x0000000000000000 rdi: 0x00000000000000bb rsi: 0x0000000000000715 rbp: 0x00007ffedff387d0 rsp: 0x00007ffedff38710 r8: 0x00000000000000ff r9: 0x00000000000007fb r10: 0x0000000000002740 r11: 0x0000000000000040 r12: 0x00007fc81f221bb8 r13: 0x0000000111194ec8 r14: 0x00007ffedff389a0 r15: 0x00007fc81f221b80 rip: 0x0000000116e325ed rfl: 0x0000000000010206 cr2: 0x0000001d00000001 Logical CPU: 0 Error Code: 0x00000004 Trap Number: Binary Images: // removed for brevity External Modification Summary: Calls made by other processes targeting this process: task_for_pid: 8 thread_create: 0 thread_set_state: 0 Calls made by this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by all processes on this machine: task_for_pid: 1531117 thread_create: 0 thread_set_state: 21209 VM Region Summary: ReadOnly portion of Libraries: Total=682.2M resident=0K(0%) swapped_out_or_unallocated=682.2M(100%) Writable regions: Total=829.0M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=829.0M(100%) VIRTUAL REGION REGION TYPE SIZE COUNT (non-coalesced) =========== ======= ======= Accelerate framework 384K 4 Activity Tracing 256K 2 CG backing stores 1760K 3 CG image 432K 19 CoreAnimation 576K 25 CoreGraphics 8K 2 CoreImage 160K 25 CoreUI image data 3384K 39 CoreUI image file 244K 7 Foundation 28K 3 Image IO 256K 2 JS JIT generated code 232K 24 JS VM register file 31.5M 28 JS VM register file (reserved) 6120K 4 reserved VM address space (unallocated) Kernel Alloc Once 8K 2 MALLOC 740.6M 126 MALLOC guard page 32K 7 Memory Tag 242 12K 2 Memory Tag 251 32K 2 OpenGL GLSL 256K 4 STACK GUARD 56.1M 18 Stack 16.1M 18 VM_ALLOCATE 3908K 103 WebAssembly memory 24.0M 7 __DATA 60.5M 491 __FONT_DATA 4K 2 __GLSLBUILTINS 5176K 2 __LINKEDIT 248.3M 114 __TEXT 433.9M 475 __UNICODE 564K 2 mapped file 65.2M 216 shared memory 744K 17 =========== ======= ======= TOTAL 1.7G 1763 TOTAL, minus reserved VM space 1.7G 1763
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@AaronC said in Qt Creator randomly crashing at Debugger::Internal::QmlInspectorAgent::onResult():
Any ideas how to pinpoint where the bug is in my QML?
QtCreator should not crash because of some QML code.
Did you file a bug in Qt bug tracker?
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I will submit a bug report. My hunch is that my QML is getting bad data from one of my models, causing QmlInspectorAgent to crash out. Because this causes Qt Creator to just go away, it leaves me no breadcrumbs to help pinpoint the problem. So far, instrumenting my code hasn't helped me find the bug. Besides instrumenting my models, any other ideas how to figure this out?
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@AaronC Reported as QTCREATORBUG-22654
