runtime: TestCgoCrashHandler failures

[gopherbot]

#!watchflakes
default <- pkg == "runtime" && test == "TestCgoCrashHandler"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestCgoCrashHandler
=== PAUSE TestCgoCrashHandler
=== CONT  TestCgoCrashHandler
    crash_test.go:220: C:\b\s\w\ir\x\t\go-build826136382\testprogcgo.exe Crash (37.1086ms): ok
    crash_test.go:226: output:
        main: recovered done
        new-thread: recovered done
        second-new-thread: recovered done
        main-again: recovered done
        runtime: failed to create new OS thread (5)
        
        
        wanted:
        main: recovered done
        new-thread: recovered done
        second-new-thread: recovered done
        main-again: recovered done
--- FAIL: TestCgoCrashHandler (0.04s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime" && test == "TestCgoCrashHandler"

2025-09-10 22:06 gotip-windows-amd64 go@de5d7ecc runtime.TestCgoCrashHandler (log)

=== RUN   TestCgoCrashHandler
=== PAUSE TestCgoCrashHandler
=== CONT  TestCgoCrashHandler
    crash_test.go:220: C:\b\s\w\ir\x\t\go-build826136382\testprogcgo.exe Crash (37.1086ms): ok
    crash_test.go:226: output:
        main: recovered done
        new-thread: recovered done
        second-new-thread: recovered done
        main-again: recovered done
        runtime: failed to create new OS thread (5)
        
        
        wanted:
        main: recovered done
        new-thread: recovered done
        second-new-thread: recovered done
        main-again: recovered done
--- FAIL: TestCgoCrashHandler (0.04s)

— watchflakes

[prattmic]

cc @golang/windows

[gopherbot]

Change https://go.dev/cl/706075 mentions this issue: runtime/cgo: retry when CreateThread fails with ERROR_ACCESS_DENIED