Panic mutexes that can't lock for 30 seconds, in debug builds #7468
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lucasmerlin
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* Recently CI runs started to hang randomly: https://github.com/emilk/egui/actions/runs/17427449210/job/49477714447?pr=7359 This fixes the deadlock and adds the basic deadlock detection we also added to Mutexes in #7468. Also, interestingly, the more sophisticated deadlock detection (behind the deadlock_detection feature) didn't catch this for some reason. I wonder why it exists in the first place, when parking_lot also has built in deadlock detection? It also seems to make tests slower, widget_tests usually needs ~30s, with the deadlock detection removed its only ~12s.
lucasmerlin
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Sep 4, 2025
I'm trying to debug a suspected deadlock in the CI for #7467 Since we use our own mutex wrappers, we can just panic if the lock is too slow. Ugly and effective :)
lucasmerlin
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Sep 4, 2025
* Recently CI runs started to hang randomly: https://github.com/emilk/egui/actions/runs/17427449210/job/49477714447?pr=7359 This fixes the deadlock and adds the basic deadlock detection we also added to Mutexes in #7468. Also, interestingly, the more sophisticated deadlock detection (behind the deadlock_detection feature) didn't catch this for some reason. I wonder why it exists in the first place, when parking_lot also has built in deadlock detection? It also seems to make tests slower, widget_tests usually needs ~30s, with the deadlock detection removed its only ~12s.
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I'm trying to debug a suspected deadlock in the CI for #7467
Since we use our own mutex wrappers, we can just panic if the lock is too slow. Ugly and effective :)