[MU4 Issue] MS 3.6 Plugin Crashes in MS4 Nightly

[JeffRocchio]

A custom build plugin I run nearly daily in MS 3.6 crashes MS4 nightly build.

I have included links to the console output, the plugin code, and the score against which I run the plugin as file attachments.

Summary:

Running MS4 nightly build of 2022-08-29

Attempting to run my custom plugin: MtnDulcimer-CromoTABtoDiatonic_rel-1.0.qml. The plugin QML file is in /home/jroc/Documents/MuseScore4Development/Plugins/ and is seen by MS4, and appears in the MS4 Plugins menu. This plugin runs sucessfully (on a nearly daily basis) in MS3.6. I am attempting to run it as-is in MS4 nightly, I've not made any changes from the version I run in MS3.6. The plugin does appear to run to conclusion prior to crashing MS4, as I am able to see, for a brief half-second, the final popup window I present the user with upon successful completion.

I do see a few of these warning statements in the console output:

"16:26:32.200 | WARN | main_thread | QmlPlugin | setMenuPath: Not supported!! Use:title."

So I did try commenting out the menuPath: statement in my plugin's code, but that had no effect.

I am on fedora Linux 35

Attachments:

Issue_3.6-Plugin-Crashes_ConsoleLog.txt

Test-3.6Plugin-Parts.pdf

MtnDulcimer-CromoTABtoDiatonic_rel-1.0.pdf

[JeffRocchio]

This is caused by the use of Qt.quit() in the plugin code. When I modify the code to change Qt.quit() to quit() then my 3.6 plugins run fine. See issue #13222.