cmd/compile: TestScript/issue77033 failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/compile" && test == "TestScript/issue77033"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestScript/issue77033
=== PAUSE TestScript/issue77033
=== CONT  TestScript/issue77033
    run.go:226: 2026-02-06T17:48:47Z
    run.go:228: $WORK=C:\b\s\w\ir\x\t\TestScriptissue77033808663770\001
    run.go:235: 
        ALLUSERSPROFILE=C:\ProgramData
        APPDATA=C:\Users\chrome-bot\AppData\Roaming
        AR=ar
        BOTO_CONFIG=C:\b\s\w\ir\x\a\gsutil-bbagent\.boto
...
        [stdout]
        goos: windows
        goarch: amd64
        pkg: demo
        cpu: Intel(R) Xeon(R) CPU @ 2.00GHz
        BenchmarkFoo-16    	 8263204	       153.4 ns/op
        PASS
        ok  	demo	1.441s
    run.go:235: FAIL: testdata\script\issue77033.txt:2: go test -bench=Foo -pgo=default.pgo: exec: canceling Cmd: not supported by windows
--- FAIL: TestScript/issue77033 (334.11s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/compile" && test == "TestScript/issue77033"

2026-02-06 17:28 gotip-windows-amd64-race go@824befbc cmd/compile.TestScript/issue77033 (log)

=== RUN   TestScript/issue77033
=== PAUSE TestScript/issue77033
=== CONT  TestScript/issue77033
    run.go:226: 2026-02-06T17:48:47Z
    run.go:228: $WORK=C:\b\s\w\ir\x\t\TestScriptissue77033808663770\001
    run.go:235: 
        ALLUSERSPROFILE=C:\ProgramData
        APPDATA=C:\Users\chrome-bot\AppData\Roaming
        AR=ar
        BOTO_CONFIG=C:\b\s\w\ir\x\a\gsutil-bbagent\.boto
...
        [stdout]
        goos: windows
        goarch: amd64
        pkg: demo
        cpu: Intel(R) Xeon(R) CPU @ 2.00GHz
        BenchmarkFoo-16    	 8263204	       153.4 ns/op
        PASS
        ok  	demo	1.441s
    run.go:235: FAIL: testdata\script\issue77033.txt:2: go test -bench=Foo -pgo=default.pgo: exec: canceling Cmd: not supported by windows
--- FAIL: TestScript/issue77033 (334.11s)

— watchflakes

[cherrymui]

cc @golang/windows

[alexbrainman]

Looking at the error message

    run.go:235: FAIL: testdata\script\issue77033.txt:2: go test -bench=Foo -pgo=default.pgo: exec: canceling Cmd: not supported by windows

it appears to me that this benchmark test src/cmd/compile/testdata/script/issue77033.txt from https://go-review.googlesource.com/c/go/+/732140 failed to complete within 60 seconds. Not sure why the test took so long.

The not supported by windows error message comes from

go/src/os/exec_windows.go

Line 77 in 683aa88

return syscall.Errno(syscall.EWINDOWS)

, because the run.go calls cmd.Process.Signal(os.Interrupt)

go/src/cmd/internal/script/scripttest/run.go

Line 109 in 683aa88

return cmd.Process.Signal(os.Interrupt)

, but windows only supports os.Kill, but not os.Interrupt.

Not sure what else I can help you with here.

Leaving for @golang/runtime

[mknyszek]

We still don't really understand why this is timing out right? It could be builder related. Could it be compiler related?

CC @golang/compiler

[alexbrainman]

We still don't really understand why this is timing out right? It could be builder related. Could it be compiler related?

I have no idea where the problem is. I run this test twice and it takes about 4-5 seconds to run the test on my slow PC.

But I could see the bug to be in the run.go program while measuring time. Or it could be anywhere else given the timeout happens while running benchmark.

Alex

[alexbrainman]

Here is my test output that I forget to include here.

C:\Users\User\src\go\src>go test cmd/compile -v -run=Script/issue77033 -count=1
=== RUN   TestScript
=== RUN   TestScript/issue77033
=== PAUSE TestScript/issue77033
=== CONT  TestScript/issue77033
    run.go:226: 2026-02-20T01:54:54Z
    run.go:228: $WORK=C:\Users\User\AppData\Local\Temp\TestScriptissue77033205487227\001
    run.go:235:
...
        > go test -bench=Foo -cpuprofile=default.pgo
        [stdout]
        goos: windows
        goarch: amd64
        pkg: demo
        cpu: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
        BenchmarkFoo-4           6291480               183.6 ns/op
        PASS
        ok      demo    2.002s
        > go test -bench=Foo -pgo=default.pgo
        [stdout]
        goos: windows
        goarch: amd64
        pkg: demo
        cpu: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
        BenchmarkFoo-4           8409679               176.1 ns/op
        PASS
        ok      demo    2.178s
        > ! stdout 'FAIL'
--- PASS: TestScript (24.59s)
    --- PASS: TestScript/issue77033 (62.78s)
PASS
ok      cmd/compile     87.642s

C:\Users\User\src\go\src>go test cmd/compile -v -run=Script/issue77033 -count=1
=== RUN   TestScript
=== RUN   TestScript/issue77033
=== PAUSE TestScript/issue77033
=== CONT  TestScript/issue77033
    run.go:226: 2026-02-20T01:50:17Z
    run.go:228: $WORK=C:\Users\User\AppData\Local\Temp\TestScriptissue770332014476885\001
    run.go:235:
...
        > go test -bench=Foo -cpuprofile=default.pgo
        [stdout]
        goos: windows
        goarch: amd64
        pkg: demo
        cpu: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
        BenchmarkFoo-4           6721780               259.2 ns/op
        PASS
        ok      demo    2.643s
        > go test -bench=Foo -pgo=default.pgo
        [stdout]
        goos: windows
        goarch: amd64
        pkg: demo
        cpu: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
        BenchmarkFoo-4           7290542               190.7 ns/op
        PASS
        ok      demo    2.096s
        > ! stdout 'FAIL'
--- PASS: TestScript (35.11s)
    --- PASS: TestScript/issue77033 (149.63s)
PASS
ok      cmd/compile     184.910s
C:\Users\User\src\go\src>

Alex

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/compile" && test == "TestScript/issue77033"

2026-03-26 20:19 gotip-windows-amd64-race go@353d834d cmd/compile.TestScript/issue77033 (log)

=== RUN   TestScript/issue77033
=== PAUSE TestScript/issue77033
=== CONT  TestScript/issue77033
    run.go:250: 2026-03-26T20:31:40Z
    run.go:252: $WORK=C:\b\s\w\ir\x\t\TestScriptissue77033678345654\001
    run.go:259: 
        ALLUSERSPROFILE=C:\ProgramData
        APPDATA=C:\Users\chrome-bot\AppData\Roaming
        AR=ar
        BOTO_CONFIG=C:\b\s\w\ir\x\a\gsutil-bbagent\.boto
...
        [stdout]
        goos: windows
        goarch: amd64
        pkg: demo
        cpu: Intel(R) Xeon(R) CPU @ 2.00GHz
        BenchmarkFoo-16    	 9025317	       135.9 ns/op
        PASS
        ok  	demo	5.480s
    run.go:259: FAIL: testdata\script\issue77033.txt:2: go test -bench=Foo -pgo=default.pgo: exec: canceling Cmd: not supported by windows
--- FAIL: TestScript/issue77033 (340.07s)

— watchflakes

[gopherbot]

Change https://go.dev/cl/762980 mentions this issue: cmd/compile/testdata/script/issue77033.txt: make test panic