Segfault: DEBUG_ASSERT(!m_ptr || static_cast<const QObject*>(m_ptr)->pt());

[xuijuthub]

Bug Description

Core was generated by `./mixxx'.
Program terminated with signal SIGSEGV, Segmentation fault.
Address not mapped to object.
#0  parented_ptr<QWidgetAction>::~parented_ptr (this=<optimized out>)
    at src/util/parented_ptr.h:37
37              DEBUG_ASSERT(!m_ptr || static_cast<const QObject*>(m_ptr)->pt());
[Current thread is 1 (LWP 754461)]
(gdb) bt
#0  parented_ptr<QWidgetAction>::~parented_ptr (this=<optimized out>)
    at src/util/parented_ptr.h:37
#1  parented_ptr<QWidgetAction>::operator=<QWidgetAction, QWidgetAction>
    (this=0x1250db2a86e8, u=<optimized out>) at src/util/parented_ptr.h:66
#2  WSearchRelatedTracksMenu::addActionsForTrack
    (this=0x1250db2a86c0, track=...)
    at /home/user/mix/mixxx/src/widget/wsearchrelatedtracksmenu.cpp:367
#3  0x0000000000dd79f7 in WTrackMenu::createMenus()::$_0::operator()() const
    (this=<optimized out>)
    at /home/user/mix/mixxx/src/widget/wtrackmenu.cpp:246
#4  QtPrivate::FunctorCall<std::__1::integer_sequence<unsigned long>, QtPriv:List<>, void, WTrackMenu::createMenus()::$_0>::call(WTrackMenu::createMenus$_0&, void**)::{lambda()#1}::operator()() const (this=<optimized out>)
    at /usr/local/include/qt6/QtCore/qobjectdefs_impl.h:116
#5  QtPrivate::FunctorCallBase::call_internal<void, QtPrivate::FunctorCall<s__1::integer_sequence<unsigned long>, QtPrivate::List<>, void, WTrackMenu::ceMenus()::$_0>::call(WTrackMenu::createMenus()::$_0&, void**)::{lambda()#1}>d**, QtPrivate::FunctorCall<std::__1::integer_sequence<unsigned long>, QtPri::List<>, void, WTrackMenu::createMenus()::$_0>::call(WTrackMenu::createMenu:$_0&, void**)::{lambda()#1}&&) (args=<optimized out>, fn=<optimized out>)
    at /usr/local/include/qt6/QtCore/qobjectdefs_impl.h:65
#6  QtPrivate::FunctorCall<std::__1::integer_sequence<unsigned long>, QtPriv:List<>, void, WTrackMenu::createMenus()::$_0>::call(WTrackMenu::createMenus--Type <RET> for more, q to quit, c to continue without paging--
$_0&, void**) (f=<optimized out>, arg=<optimized out>)
    at /usr/local/include/qt6/QtCore/qobjectdefs_impl.h:115
#7  QtPrivate::FunctorCallable<WTrackMenu::createMenus()::$_0>::call<QtPrivate::List<>, void>(WTrackMenu::createMenus()::$_0&, void*, void**)
    (f=<optimized out>, arg=<optimized out>)
    at /usr/local/include/qt6/QtCore/qobjectdefs_impl.h:337
#8  QtPrivate::QCallableObject<WTrackMenu::createMenus()::$_0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)
    (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>)
    at /usr/local/include/qt6/QtCore/qobjectdefs_impl.h:547
#9  0x000000087bd799d3 in ??? () at /usr/local/lib/qt6/libQt6Core.so.6
#10 0x000000085d6e561f in ??? () at /usr/local/lib/qt6/libQt6Widgets.so.6
#11 0x000000085d6e043b in QMenu::internalDelayedPopup() ()
    at /usr/local/lib/qt6/libQt6Widgets.so.6
#12 0x000000087bd6c989 in QObject::event(QEvent*) ()
    at /usr/local/lib/qt6/libQt6Core.so.6
#13 0x000000085d55f9db in QWidget::event(QEvent*) ()
    at /usr/local/lib/qt6/libQt6Widgets.so.6
#14 0x000000085d6e8545 in QMenu::event(QEvent*) ()
    at /usr/local/lib/qt6/libQt6Widgets.so.6
#15 0x000000085d505698 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () at /usr/local/lib/qt6/libQt6Widgets.so.6
#16 0x000000085d50669e in QApplication::notify(QObject*, QEvent*) ()
    at /usr/local/lib/qt6/libQt6Widgets.so.6
#17 0x0000000000a41d3f in MixxxApplication::notify
    (this=0x821a7f780, pTarget=0x1250daaed600, pEvent=0x821a7f400)
    at /home/user/mix/mixxx/src/mixxxapplication.cpp:215
#18 0x000000087bd1e50b in QCoreApplication::sendEvent(QObject*, QEvent*) ()
    at /usr/local/lib/qt6/libQt6Core.so.6
#19 0x000000087bebf1a1 in QTimerInfoList::activateTimers() ()
    at /usr/local/lib/qt6/libQt6Core.so.6
#20 0x000000087bfbe861 in ??? () at /usr/local/lib/qt6/libQt6Core.so.6
#21 0x000000086b7a8241 in ??? () at /usr/local/lib/libglib-2.0.so.0
#22 0x000000086b7a86c7 in ??? () at /usr/local/lib/libglib-2.0.so.0
#23 0x000000086b7a8766 in g_main_context_iteration ()
    at /usr/local/lib/libglib-2.0.so.0
#24 0x000000087bfbded2 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/local/lib/qt6/libQt6Core.so.6
#25 0x000000087bd27d77 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/local/lib/qt6/libQt6Core.so.6
#26 0x000000087bd1e18f in QCoreApplication::exec() ()
    at /usr/local/lib/qt6/libQt6Core.so.6
#27 0x0000000000640f50 in (anonymous namespace)::runMixxx
    (pApp=<optimized out>, args=<optimized out>)
    at /home/user/mix/mixxx/src/main.cpp:110
--Type <RET> for more, q to quit, c to continue without paging--
#28 main (argc=1, argv=<optimized out>)
    at /home/user/mix/mixxx/src/main.cpp:288

This occured casually clicking / loading tracks from library.. When before that traversed directory which contained 0 byte corrupted files, that should have been mp3, spitting some
warning [BrowseThread] No file type registered for MIME type QMimeType("application/x-zerosize"), might be related.. Will try reaching that directory to reproduce bug some more times.

Version

2.5 0136078

OS

FreeBSD 14.3-RELEASE

[xuijuthub]

inca babies - swamp street soul.zip
Related zero size files.

[xuijuthub]

Played around with 0 byte files, does not seem to trigger it.

Recently jiggled laptop USB a bit, apparently drive lost connection and NTFS got marked unclean - eheh that's what I get for having somewhat unstable USB connection.. Using NTFS on non-windows is a mistake.

$MFTMirr does not match $MFT (record 5).
Failed to mount '/dev/ntfs/entertainment.music': Input/output error
NTFS is inconsistent. Run chkdsk /f on Windows then reboot it TWICE!
The usage of the /f parameter is very IMPORTANT! No modification was
made to NTFS by this software.

Maybe segfault was caused by one of the times USB signal was out while file was in the middle of being inspected?..

[ronso0]

The backtrace you posted is about the Search Related Tracks menu in the track menu.
A similar issue was reported on Windows for #13602 (comment)

[Swiftb0y]

stackttrace looks like either a corrupted pointer or a use-after-free/double-free (can't really tell the difference based on the stacktrace). Either way its a symptom of a bigger issue.