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  1. Qt
  2. QTBUG-63919

[REG 5.9.1 -> 5.9.2] application crashes when using QML-Debugger

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    Description

      Our application crashes when debugging it from inside QtCreator with QMLDebugger enabled.
      There are multiple warnings "<Unknown File>: QML Rectangle: Cannot anchor to an item that isn't a parent or sibling." prior to the crash.

      Debugging it with only the C++ debugger enabled works fine.

      This crash and the warnings don't occur on Qt5.9.1.

      Sorry, but I couldn't create a simple demo project that reproduces the behaviour.

      Here is the stacktrace:

      1   QObjectPrivate::addConnection                                                                                     qobject.cpp                388  0x7ffff6bce444 
2   QObjectPrivate::connectImpl                                                                                       qobject.cpp                4841 0x7ffff6bceb0a 
3   QObject::connectImpl                                                                                              qobject.cpp                4784 0x7ffff6bcef12 
4   QObject::connect<void (QObject:: *)(QObject *), void ((anonymous namespace)::ObjectReferenceHash:: *)(QObject *)> qobject.h                  259  0x7ffff72f9a73 
5   QQmlDebugService::idForObject                                                                                     qqmldebugservice.cpp       165  0x7ffff72f9a73 
6   QQmlEngineDebugServiceImpl::storeObjectIds                                                                        qqmlenginedebugservice.cpp 330  0x7fffe8395509 
7   QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 345  0x7fffe83955ee 
8   QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
9   QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
10  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
11  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
12  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
13  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
14  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
15  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
16  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
17  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
18  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
19  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
20  QQmlEngineDebugServiceImpl::buildObjectList                                                                       qqmlenginedebugservice.cpp 361  0x7fffe8395649 
... <Mehr>

      Attachments

        1. QTBUG-63919.zip
          4 kB
        2. valgrind_and_qml.png
          valgrind_and_qml.png
          21 kB
        3. valgrind_output.txt
          205 kB
        4. valgrind_output2.txt
          219 kB
        5. valgrind_output3.txt
          223 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-63078 Crash in qtcharts tests during qt5.git integration in '5.9'

          • P0: Blocker - MUST be fixed ASAP. This includes issues that prevent/block further Qt development; Legal issues & Serious data loss issues.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-63672 Modal popup causes crash when used in StackView

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-61781 Crash when accessing a QML singleton from anonymous function

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

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              ulherman Ulf Hermann
              lkdem Ludger Krämer
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              Dates

                Created:
                Updated:
                Resolved: