all: exec: WaitDelay expired before I/O complete failures on Darwin and Windows

[mknyszek]

#!watchflakes
default <-  (goos == "windows" || goos == "darwin") && log ~ `WaitDelay expired before I/O complete`

These flakes have been happening in many different circumstances. All these tests exec subprocesses. See previously #58230. #63937 may also be related.

This issues accumulates such failures for Windows and Darwin.

• runtime: TestGoroutineLeakProfile/Etcd6873 failures #76646
• cmd/link: TestScript/randlayout_option failures #71843
• cmd/compile: TestScript/script_test_basics failures #70356
• cmd/link: TestScript/script_test_basics failures #68788
• net/http: TestOmitHTTP2Vet failures #65596

[gabyhelp]

Related Issues

• cmd/go: exec: WaitDelay expired before I/O complete #58230 (closed)
• runtime: TestCgoLockOSThreadExit failures with `WaitDelay expired` #57083 (closed)
• runtime: TestCgoExecSignalMask failures #56584 (closed)
• runtime: TestBigGOMAXPROCS failures #56582 (closed)
• runtime: TestGoroutineLeakProfile/Moby28462 failures #76617 (closed)
• runtime: TestEINTR failures #60094 (closed)
• os: TestPipeIOCloseRace timeout on Windows blocked in `syscall.CancelIoEx` #64482
• os: TestCloseWithBlockingReadByFd failures #57994 (closed)
• os: TestCloseWithBlockingReadByNewFile failures #57993 (closed)
• build: os/exec failures #68436 (closed)

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[adonovan]

BTW, hanging go commands on darwin have been a persistent pain for gopls too; see:

• x/tools/gopls: regtest flakes due to hanging go commands #54461 (mostly about darwin)
• os,internal/poll: reads from closed pipes sometimes do not unblock on darwin #63937

[dmitshur]

Added this to Test Flakes project, otherwise watchflakes won't post to it.

Note that some of the matching failures in #68788 were on netbsd/arm64, freebsd/riscv64, freebsd/amd64, maybe more. Perhaps they can be merged into a similar issue for everything but Windows/macOS.