| Summary: | QObject: Cannot create children for a parent that is in a different thread. | ||
|---|---|---|---|
| Product: | [Plasma] Breeze | Reporter: | wolthera <griffinvalley> |
| Component: | QStyle | Assignee: | Hugo Pereira Da Costa <hugo.pereira.da.costa> |
| Status: | RESOLVED FIXED | ||
| Severity: | minor | CC: | halla, hugo.pereira.da.costa, uhhadd |
| Priority: | NOR | ||
| Version First Reported In: | unspecified | ||
| Target Milestone: | --- | ||
| Platform: | Neon | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
|
Description
wolthera
2017-08-30 13:53:37 UTC
Hi Thanks for the report. Indeed this should really not happen. Do you see this with every application, or only with krita ? What is your QT version ? (In reply to Hugo Pereira Da Costa from comment #1) > Hi > Thanks for the report. > Indeed this should really not happen. Do you see this with every > application, or only with krita ? Ditch that. You already answered. I cannot reproduce (I use latest Breeze, but a somewhat old Qt, namely 5.7.1) > What is your QT version ? looking at the code it seems that for this to happen you would need the same Widget style object to be used in different threads. I have no clue how to adress that, then ... I get it as well when plasma dies and I start it up manually in the terminal. My Qt version is 5.9.1, I also double checked if it happened with Fusion, and it doesn't. I honestly don't know enough about qtstyles to add anything more meaningful. (In reply to wolthera from comment #4) > I get it as well when plasma dies and I start it up manually in the terminal. > > My Qt version is 5.9.1, I also double checked if it happened with Fusion, > and it doesn't. Yep. I would not expect to. The fact that it does not happen with fusion is because it does not try to create objects. Should happen with oxygen too, and possibly QtCurve. The way around this would be to change the way the said object are created, kept track of and deleted. (note: they are needed to make these nice animations in breeze, on mouse-over, focus change, etc.) But that would require careful testing, and first with reproducing the issue. I'll start with updating Qt and testing. Will keep you posted. Sorry for the trouble Any progress here? I'm getting this all the time as well, now that I've moved on from using my own Qt 5.6. Hm... We probably also should debug this inside Krita, because it only happens in master, not in 3.3. (In reply to Boudewijn Rempt from comment #7) > Hm... We probably also should debug this inside Krita, because it only > happens in master, not in 3.3. Hi Boud, I'm compiling Qt 5.9 as we speak to try reproduce. My impression is that the warning is (among other things) a side effect of using QtQuickControls. Did you by any chance introduce some in Krita in recent versions ? If yes that would explain. Hugo Hm... Yes, we started using Qt Quick, but not QtQuickControls, afaik, but... Wolthera's report was from before that! So Compiled Qt 5.9 (5.9.3) Compiled breeze from master. Modified QT_PLUGIN_PATH to get the proper breeze, ran Krita (version 3.2.1), and I cannot reproduce. Nor can I reproduce with dolphin, gwenview, kate ... @wolthera can you confirm that you see the error with other applications than krita, and if yes, which one ? No, I cannot see it happening in any other qt programs. I tried tiled, because I thought it may have something to do with qt's opengl painter, but even there it went fine. Appears to have been fixed since this was reported; please re-open if you still encounter this error. |