Details
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Type:
Bug
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Status: Closed
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Priority:
P1: Critical
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Resolution: Done
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Affects Version/s: 5.15.1
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Fix Version/s: 5.15.2, 6.0.0 Alpha
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Component/s: Core: Threads
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Labels:None
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Platform/s:
Linux/X11
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Commits:fe36d47b371b71ad5fec30d4b5d7bf0baa0205ea (qt/qtbase/dev) a5e6c50ef45e9b75867e1730c510f5739b00f176 (qt/qtbase/5.15)
Description
There is a crash in QThreadPool::clear() when auto-deleting QRunnables are being used.
Attachment a very simple example project which does this in a loop:
- Calls QThreadPool::clear()
- Starts a bunch of runnables (~500) in QThreadPool. QRunnable::autoDelete() = true
- goto 1
After a few iterations it crashes on QThreadPool::clear(). This happens consistently
I think the culprit is this commit. I've tried reverting it and the crash disappears.
Attachments
| For Gerrit Dashboard: QTBUG-87092 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 315933,3 | Fix race condition in QThreadPool::clear | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 315990,3 | Fix race condition in QThreadPool::clear | 5.15 | qt/qtbase | Status: MERGED | +2 | 0 |