Bug 416384

Summary:	Crash when editing some QML
Product:	[Applications] kate	Reporter:	David Edmundson <kde>
Component:	general	Assignee:	KWrite Developers <kwrite-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	crash	CC:	christoph, mkyral
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	New crash information added by DrKonqi New crash information added by DrKonqi

Description David Edmundson 2020-01-17 15:11:34 UTC

Application: kate (20.03.70)
 (Compiled from sources)
Qt Version: 5.14.0
Frameworks Version: 5.66.0
Operating System: Linux 5.4.8-arch1-1 x86_64
Distribution: Arch Linux

-- Information about the crash:
Editing some non-exciting regular QML. I had a crash, hope it's useful.

I then restarted and continued editing the same file and it was all fine.


Qt 5.14.1 branch

The crash does not seem to be reproducible.

-- Backtrace (Reduced):
#6  0x00007f70651210c2 in QV4::Chunk::testBit (bitmap=0x7f7054050318, index=200) at ../../include/QtQml/5.14.0/QtQml/private/../../../../../../../qt5/qtdeclarative/src/qml/memory/qv4mmdefs_p.h:142
#7  0x00007f70651214d6 in QV4::Heap::Base::inUse (this=0x7f7054051900) at ../../include/QtQml/5.14.0/QtQml/private/../../../../../../../qt5/qtdeclarative/src/qml/memory/qv4heap_p.h:127
#8  0x00007f70651217da in QV4::Managed::inUse (this=0x7f7054051908) at /home/david/projects/qt5/qtdeclarative/src/qml/jsruntime/qv4managed_p.h:177
#9  0x00007f706511f331 in QV4::MemoryManager::collectFromJSStack (this=0x56059d4cdd80, markStack=0x7fffd9d17170) at /home/david/projects/qt5/qtdeclarative/src/qml/memory/qv4mm.cpp:1219
#10 0x00007f706511d093 in QV4::MemoryManager::collectRoots (this=0x56059d4cdd80, markStack=0x7fffd9d17170) at /home/david/projects/qt5/qtdeclarative/src/qml/memory/qv4mm.cpp:873


Reported using DrKonqi

Comment 1 David Edmundson 2020-01-17 15:11:35 UTC

Created attachment 125197 [details]
New crash information added by DrKonqi

DrKonqi auto-attaching complete backtrace.

Comment 2 Christoph Cullmann 2020-01-17 18:17:21 UTC

For me that looks like the JS GC is broken :/

Comment 3 Christoph Cullmann 2020-02-01 20:28:24 UTC

If you can reproduce that, consider reporting it upstream.

I found some old report:

https://bugreports.qt.io/browse/QTBUG-69525

Comment 4 Christoph Cullmann 2020-02-01 20:28:42 UTC

Without a way to reproduce, guess we don't need to ping the Qt people.

Comment 5 Bug Janitor Service 2020-02-16 04:33:11 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 6 Bug Janitor Service 2020-03-02 04:33:13 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!

Comment 7 Marian Kyral 2020-06-03 13:18:56 UTC

Created attachment 129025 [details]
New crash information added by DrKonqi

kate (20.04.0) using Qt 5.14.1

- What I was doing when the application crashed:

I've edited regular javascript file. Nothing special, never happen to me before. After restart all works correctly.

-- Backtrace (Reduced):
#7  QV4::Heap::Base::inUse (this=0x7f7d013bc820) at ../../include/QtQml/5.14.1/QtQml/private/../../../../../src/qml/memory/qv4mmdefs_p.h:142
#8  QV4::Managed::inUse (this=0x7f7d013bc830) at jsruntime/qv4managed_p.h:177
#9  QV4::MemoryManager::collectFromJSStack (this=<optimized out>, markStack=0x7ffc341a73a0) at memory/qv4mm.cpp:1219
#10 0x00007f7d58b12189 in QV4::MemoryManager::collectRoots (this=0x5621a642a260, markStack=0x7ffc341a73a0) at memory/qv4mm.cpp:873
#11 0x00007f7d58b123bd in QV4::MemoryManager::mark (this=this@entry=0x5621a642a260) at memory/qv4mm.cpp:917