runtime: TestFinalizerOrCleanupDeadlock/Finalizer/Panic failures

[gopherbot]

#!watchflakes
default <- pkg == "runtime" && test == "TestFinalizerOrCleanupDeadlock/Finalizer/Panic"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestFinalizerOrCleanupDeadlock/Finalizer/Panic
=== PAUSE TestFinalizerOrCleanupDeadlock/Finalizer/Panic
=== CONT  TestFinalizerOrCleanupDeadlock/Finalizer/Panic
    crash_test.go:1181: /home/swarming/.swarming/w/ir/x/t/go-build393621835/testprog.exe FinalizerDeadlock: exit status 2
    crash_test.go:1184: output does not contain "runtime.runFinalizers()":
        panic: panic
        
        goroutine 1 [running]:
        main.FinalizerOrCleanupDeadlock(0x0)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/testdata/testprog/finalizer_deadlock.go:48 +0x6ab
        main.init.8.func1()
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/testdata/testprog/finalizer_deadlock.go:18 +0x1e
        main.main()
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/testdata/testprog/main.go:34 +0x14e
        
        goroutine 18 [runnable]:
        	goroutine running on other thread; stack unavailable
--- FAIL: TestFinalizerOrCleanupDeadlock/Finalizer/Panic (0.08s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime" && test == "TestFinalizerOrCleanupDeadlock/Finalizer/Panic"

2026-05-05 16:48 gotip-linux-386-sizespecializedmalloc go@f2a43196 runtime.TestFinalizerOrCleanupDeadlock/Finalizer/Panic (log)

=== RUN   TestFinalizerOrCleanupDeadlock/Finalizer/Panic
=== PAUSE TestFinalizerOrCleanupDeadlock/Finalizer/Panic
=== CONT  TestFinalizerOrCleanupDeadlock/Finalizer/Panic
    crash_test.go:1181: /home/swarming/.swarming/w/ir/x/t/go-build393621835/testprog.exe FinalizerDeadlock: exit status 2
    crash_test.go:1184: output does not contain "runtime.runFinalizers()":
        panic: panic
        
        goroutine 1 [running]:
        main.FinalizerOrCleanupDeadlock(0x0)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/testdata/testprog/finalizer_deadlock.go:48 +0x6ab
        main.init.8.func1()
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/testdata/testprog/finalizer_deadlock.go:18 +0x1e
        main.main()
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/testdata/testprog/main.go:34 +0x14e
        
        goroutine 18 [runnable]:
        	goroutine running on other thread; stack unavailable
--- FAIL: TestFinalizerOrCleanupDeadlock/Finalizer/Panic (0.08s)

— watchflakes

[dmitshur]

CC @golang/compiler.

[gopherbot]

Change https://go.dev/cl/776340 mentions this issue: runtime: deflake TestFinalizerOrCleanupDeadlock