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  1. Qt
  2. QTBUG-109314

Crash during QML item creation

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Details

    • Windows
    • 66893cd71 (dev) 3f8a4345c3907d64509793e0fbcc9c2fda0d59b3 2d7fe23b41aa3fd719b7bc8aa585ab799e4a0c39

    Description

      Starting our QML app in Qt 6.4.1 sometimes crashes in MSVC Windows debug build in the place shown in the attached screenshot.

      The QML file set in setMainQmlFile() is unfortunately too complex and has too many dependencies that we could share it.

      Screenshot however reveals that in QQmlObjectCreator::setupFunctions(),

      "name" is empty

      "QQmlPropertyData *property" retrieved from cache is then nullptr and code crashes when referencing a null pointer.

      Maybe there should be a null check?

      This does not happen every time the app is launched but maybe 10% of times, so it's timing dependant.

       

      Edit: Exactly the same crash happens also about as often when creating a semi-complex QML item once the app is running,

      by a call to Qt.createQmlObject().

       

      It seems that in compilationUnit->runtimeFunctions there are lots of these empty functions with codeOffset and codeSize being zero and name being empty

      and the crash happens when it for some reason tries to set up one of those in QQmlObjectCreator::setupFunctions().

       

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QDS-8861 unregular crashes in QQmlObjectCreator::setupFunctions()

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111385 Q_ASSERT in qv4vme_moth.cpp fails and causes crash

          • 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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111766 qml issues in Effect Maker

          • 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 in

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111042 QML cache files are re-generated all the time when they contain inline components

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111078 ExecutableCompilationUnit::saveToDisk() does not invalidate the cache it uses for loadFromDisk()

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-109314
          # Subject Branch Project Status CR V
          458221,3 WIP: QML: Do not save or load cached CUs for source code without timestamp dev qt/qtdeclarative Status: ABANDONED -2 0
          460025,3 QtQml: Remove misleading dtor of CompilationUnitMapper dev qt/qtdeclarative Status: MERGED +2 0

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              ulherman Ulf Hermann
              -mtuokko- Mikko Tuokko
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              Dates

                Created:
                Updated:
                Resolved:

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