[kmail2] [Bug 406871] New: Crash in kmail on exit [trace: Grantlee::Engine::~Engine, MessageViewer::MessagePartRendererManager::~MessagePartRendererManager]

[Kevin Funk]

https://bugs.kde.org/show_bug.cgi?id=406871

            Bug ID: 406871
           Summary: Crash in kmail on exit [trace:
                    Grantlee::Engine::~Engine,
                    MessageViewer::MessagePartRendererManager::~MessagePar
                    tRendererManager]
           Product: kmail2
           Version: Git (master)
          Platform: Compiled Sources
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: kfunk at kde.org
  Target Milestone: ---

SUMMARY
Kmail crashes when being closed.

STEPS TO REPRODUCE
1. Start kmail
2. Close kmail

Backtrace:
#0  QQmlMetaType::freeUnusedTypesAndCaches () at
/home/kfunk/devel/src/qt5.12/qtdeclarative/src/qml/qml/qqmlmetatype.cpp:2600
#1  0x00007fffe12fce83 in QJSEnginePrivate::~QJSEnginePrivate
(this=0x60c001c0b040, __in_chrg=<optimized out>) at
/home/kfunk/devel/src/qt5.12/qtdeclarative/src/qml/jsapi/qjsengine.cpp:982
#2  0x00007fffe12fce9f in QJSEnginePrivate::~QJSEnginePrivate
(this=0x60c001c0b040, __in_chrg=<optimized out>) at
/home/kfunk/devel/src/qt5.12/qtdeclarative/src/qml/jsapi/qjsengine.cpp:980
#3  0x00007ffff53650c3 in QScopedPointerDeleter<QObjectData>::cleanup
(pointer=<optimized out>) at
../../include/QtCore/../../../../../src/qt5.12/qtbase/src/corelib/tools/qscopedpointer.h:52
#4  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData>
>::~QScopedPointer (this=0x60300178b3a8, __in_chrg=<optimized out>) at
../../include/QtCore/../../../../../src/qt5.12/qtbase/src/corelib/tools/qscopedpointer.h:107
#5  QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at
/home/kfunk/devel/src/qt5.12/qtbase/src/corelib/kernel/qobject.cpp:891
#6  0x00007fffe12ff572 in QJSEngine::~QJSEngine (this=0x60300178b3a0,
__in_chrg=<optimized out>) at
/home/kfunk/devel/src/qt5.12/qtdeclarative/src/qml/jsapi/qjsengine.cpp:379
#7  0x00007fffe12ff583 in QJSEngine::~QJSEngine (this=0x60300178b3a0,
__in_chrg=<optimized out>) at
/home/kfunk/devel/src/qt5.12/qtdeclarative/src/qml/jsapi/qjsengine.cpp:375
#8  0x00007ffff5363cc4 in QObjectPrivate::deleteChildren
(this=this at entry=0x60b00016c380) at
/home/kfunk/devel/src/qt5.12/qtbase/src/corelib/kernel/qobject.cpp:2010
#9  0x00007ffff53650f5 in QObject::~QObject (this=<optimized out>,
__in_chrg=<optimized out>) at
/home/kfunk/devel/src/qt5.12/qtbase/src/corelib/kernel/qobject.cpp:1032
#10 0x00007fffe103b43b in Grantlee::ScriptableTagLibrary::~ScriptableTagLibrary
(this=0x607000ba4c00) at
templates/lib/Grantlee_Templates_autogen/MTDBPGIEEV/../../../../../../../src/kf5/grantlee/templates/scriptabletags/scriptabletags.h:58
#11 0x00007fffe103b469 in Grantlee::ScriptableTagLibrary::~ScriptableTagLibrary
(this=0x607000ba4c00) at
templates/lib/Grantlee_Templates_autogen/MTDBPGIEEV/../../../../../../../src/kf5/grantlee/templates/scriptabletags/scriptabletags.h:58
#12 0x00007ffff5363cc4 in QObjectPrivate::deleteChildren
(this=this at entry=0x60b00016c0c0) at
/home/kfunk/devel/src/qt5.12/qtbase/src/corelib/kernel/qobject.cpp:2010
#13 0x00007ffff53650f5 in QObject::~QObject (this=<optimized out>,
__in_chrg=<optimized out>) at
/home/kfunk/devel/src/qt5.12/qtbase/src/corelib/kernel/qobject.cpp:1032
#14 0x00007fffe0fef704 in Grantlee::Engine::~Engine (this=0x60300178a2c0) at
/home/kfunk/devel/src/kf5/grantlee/templates/lib/engine.cpp:60
#15 0x00007fffdf2e2482 in GrantleeTheme::Engine::~Engine (this=0x60300178a2c0)
at /home/kfunk/devel/src/kf5/grantleetheme/src/grantleethemeengine.cpp:54
#16 0x00007fffdf2e24a9 in GrantleeTheme::Engine::~Engine (this=0x60300178a2c0)
at /home/kfunk/devel/src/kf5/grantleetheme/src/grantleethemeengine.cpp:52
#17 0x00007ffff3f4f8d1 in
MessageViewer::MessagePartRendererManager::~MessagePartRendererManager
(this=0x7ffff40c8ab0
<MessageViewer::MessagePartRendererManager::self()::s_self>) at
/home/kfunk/devel/src/kf5/messagelib/messageviewer/src/messagepartthemes/default
/messagepartrenderermanager.cpp:118
#18 0x00007ffff4b442ac in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#19 0x00007ffff4b443da in exit () from /lib/x86_64-linux-gnu/libc.so.6
#20 0x00007ffff4b23b72 in __libc_start_main () from
/lib/x86_64-linux-gnu/libc.so.6
#21 0x00000000004206aa in _start ()

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