[Lazarus] EAccessViolation exception on exit qt5 project in Kubuntu 19.10

[zeljko]

On 4/14/20 6:28 PM, Florian Klämpfl via lazarus wrote:
> Am 14.04.20 um 12:55 schrieb zeljko via lazarus:
>> On 4/13/20 7:43 PM, Luca Olivetti via lazarus wrote:
>>
>>> Now I tried installing the packaged libqt5pas and still see no segfault.
>>> Note that this isn't a fresh install, I dist-upgraded it (or better 
>>> do-release-upgraded it) many times, but I don't think that should 
>>> matter.
>>
>> IMO, fpc version is important. fpc-3.0.4 from distro crashes, 
> 
> Does anybody have a stack dump of the crash? Maybe it's related to the 
> stack alignment issues which are fixed in 3.2+?

This is crash dump - Fedora 30 64bit , fpc-3.0.4, Qt5 lcl.

Thread 1 "lazarus" received signal SIGSEGV, Segmentation fault.
0x00007ffff666c7f1 in std::swap<QPostEvent> (__b=..., __a=...) at 
/usr/include/c++/9/bits/move.h:182
warning: Source file is more recent than executable.
182         swap(_Tp& __a, _Tp& __b)
(gdb) bt
#0  0x00007ffff666c7f1 in std::swap<QPostEvent> (__b=..., __a=...) at 
/usr/include/c++/9/bits/move.h:182
#1  qSwap<QPostEvent> (value2=..., value1=...) at 
../../include/QtCore/../../src/corelib/global/qglobal.h:915
#2  QCoreApplication::removePostedEvents (receiver=0x3e702c0, 
eventType=0) at kernel/qcoreapplication.cpp:1883
#3  0x00007ffff669489e in QObjectPrivate::~QObjectPrivate 
(this=0x3c8e4e0, __in_chrg=<optimized out>) at kernel/qobject.cpp:258
#4  0x00007fffe65993a0 in 
QDBusAbstractInterfacePrivate::~QDBusAbstractInterfacePrivate 
(this=0x3c8e4e0, __in_chrg=<optimized out>)
     at /usr/include/c++/9/bits/atomic_base.h:326
#5  QDBusAbstractInterfacePrivate::~QDBusAbstractInterfacePrivate 
(this=0x3c8e4e0, __in_chrg=<optimized out>) at qdbusabstractinterface_p.h:88
#6  0x00007ffff669bcd7 in QScopedPointerDeleter<QObjectData>::cleanup 
(pointer=<optimized out>) at 
../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:52
#7  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> 
 >::~QScopedPointer (this=0x3e702c8, __in_chrg=<optimized out>)
     at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:107
#8  QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) 
at kernel/qobject.cpp:891
#9  0x00007fffe569752d in 
OrgKdeKDirNotifyInterface::~OrgKdeKDirNotifyInterface (this=0x3e702c0, 
__in_chrg=<optimized out>)
     at 
/usr/src/debug/kf5-kio-5.68.0-1.fc30.x86_64/src/core/kdirnotify.cpp:34
#10 0x00007ffff669ad3c in QObjectPrivate::deleteChildren 
(this=this at entry=0x3ecf5f0) at kernel/qobject.cpp:2016
#11 0x00007ffff669bc8f in QObject::~QObject (this=<optimized out>, 
__in_chrg=<optimized out>) at kernel/qobject.cpp:1032
#12 0x00007fffe56b8ffe in KCoreDirListerCache::~KCoreDirListerCache 
(this=0x7fffe5728500 <(anonymous 
namespace)::Q_QGS_kDirListerCache::innerFunction()::holder>,
     __in_chrg=<optimized out>) at /usr/include/c++/9/bits/atomic_base.h:326
#13 0x00007fffe56b947d in (anonymous 
namespace)::Q_QGS_kDirListerCache::Holder::~Holder (this=<optimized 
out>, __in_chrg=<optimized out>)
     at 
/usr/src/debug/kf5-kio-5.68.0-1.fc30.x86_64/src/core/kcoredirlister.cpp:54
#14 0x00007ffff7778680 in __run_exit_handlers () from /lib64/libc.so.6
#15 0x00007ffff77787c0 in exit () from /lib64/libc.so.6
#16 0x00007ffff7761f4a in __libc_start_main () from /lib64/libc.so.6
#17 0x00007fffffffdcf0 in ?? ()
#18 0x0000000000000000 in ?? ()