Crash by using QQuickWidget

[amuralev]

Bug is reproduced on latest release and master brahch:

1. Create FLOAT KDDockWidget with QQuickWidget (for example "kddockwidgets_minimal_example");
2. Try dock to MainWindow

Environment:

1. Windows 10 (64bit);
2. Qt 5.15.1 MSVC 2019 64bit;
3. KDDockWidgets: master and 1.2.

[iamsergio]

Can't repro on Linux.
Can you find out if it's not a Qt bug ? Assert seems to be in Qt, but can't the whole backtrace

[amuralev]

According to our observations, the bug is NOT reproduced when using KDDW 1.1.1 (release)

Environment:

Windows 10 (64bit);
Qt 5.15.1 MSVC 2019 64bit;
KDDockWidgets: version 1.1.1.

[amuralev]

Unfortunately, the bug is reproduced when using a KDDW 1.1.1, but in a different form (can reproduced by sample and instructions at GIF-animation)

When using one monitor:

When move mainwindow + docks to secondary monitor than try do anything (for exmaple operations dock/undock/tabify) happens crash:

Also we have problems with OpenGL-context with KDDW 1.1.1 + QOpenGLWidget + OpenSceneGraph.

[amuralev]

Patch for example (QQuickWidget):
patch_sample_QQuickWidget.txt

Similar behavior is observed when using QOpenGLWidget.

Patch for example (QOpenGLWidget):
patch_sample_QOpenGLWidget.txt

[iamsergio]

can you do a git diff > patch.diff at the root of the repo and attach here
The first patch seems to be missing changes to CMakeLists.txt

[iamsergio]

main.qml is missing ? Might be easier to commit to a fork, then I can check it out.

Trying the QOpenGLWidget but can't repro so far, will try with another GPU

[amuralev]

patch.txt

Steps:

1. Show "DockWidget Add test application for generating random dockwidget for testing potential bugs #1" from menu;
2. Undock "DockWidget Add test application for generating random dockwidget for testing potential bugs #1" by mouse drag;
3. Show "DockWidget Remove duplicate logging_p.h #2" from menu;
4. Undock "DockWidget Remove duplicate logging_p.h #2" by mouse drag;

See to output and painting "DockWidget #2".

To reproduced crash:

1. Move MainWindow to secondary screen;
2. Dock "DockWidget Add test application for generating random dockwidget for testing potential bugs #1" and "DockWidget Remove duplicate logging_p.h #2" to "DockWidget #0"
3. Try undock "DockWidget Add test application for generating random dockwidget for testing potential bugs #1" or "DockWidget Remove duplicate logging_p.h #2"

[iamsergio]

Doesn't seem to apply

git apply ~/Downloads/patch.txt
C:/Users/serj/Downloads/patch.txt:64: trailing whitespace.
    else
error: examples/dockwidgets/main.qml: No such file or directory
error: patch failed: examples/dockwidgets/resources_example.qrc:6
error: examples/dockwidgets/resources_example.qrc: patch does not apply

tried master, 1.2 and 1.1

looks like the contents of the patch is for an older KDDW, can you pull the latest master and get a new diff

thanks

[amuralev]

Sorry, can you try again?
patch.txt

[amuralev]

Thanks for the fix!

[iamsergio]

Does it fix the QOpenGLWidget case too ?

[amuralev]

it seems that fix "cover" QOpenGLWidget-case (at least there is no crash and "bad"-output).