cmd/go: TestScript/build_pgo failures #75636
Description
#!watchflakes
default <- pkg == "cmd/go" && test == "TestScript/build_pgo"
Issue created automatically to collect these failures.
Example (log):
=== RUN TestScript/build_pgo
=== PAUSE TestScript/build_pgo
=== CONT TestScript/build_pgo
script_test.go:139: 2025-09-25T15:36:54Z
script_test.go:141: $WORK=/Users/swarming/.swarming/w/ir/x/t/cmd-go-test-3548313798/tmpdir1866919001/build_pgo2227623247
script_test.go:163:
PATH=/Users/swarming/.swarming/w/ir/x/t/cmd-go-test-3548313798/tmpdir1866919001/testbin:/Users/swarming/.swarming/w/ir/x/w/goroot/bin:/Users/swarming/.swarming/w/ir/x/w/goroot/bin:/Users/swarming/.swarming/w/ir/x/w/goroot/bin:/Users/swarming/.swarming/w/ir/cache/tools/bin:/Users/swarming/.swarming/w/ir/bbagent_utility_packages:/Users/swarming/.swarming/w/ir/bbagent_utility_packages/bin:/Users/swarming/.swarming/w/ir/cipd_bin_packages:/Users/swarming/.swarming/w/ir/cipd_bin_packages/bin:/Users/swarming/.swarming/w/ir/cache/cipd_client:/Users/swarming/.swarming/w/ir/cache/cipd_client/bin:/Users/swarming/.swarming/cipd_cache/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin
HOME=/no-home
CCACHE_DISABLE=1
GOARCH=amd64
...
# build without PGO (22.623s)
> go build triv.go
# build with PGO, should trigger rebuild
# starting with an empty profile (the compiler accepts it) (0.290s)
> go build -x -pgo=prof -o triv.exe triv.go
[stderr]
WORK=/Users/swarming/.swarming/w/ir/x/t/cmd-go-test-3548313798/tmpdir1866919001/build_pgo2227623247/tmp/go-build3014742390
go: error obtaining buildID for go tool preprofile: fork/exec /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/preprofile: exec format error
script_test.go:163: FAIL: testdata/script/build_pgo.txt:15: go build -x -pgo=prof -o triv.exe triv.go: exit status 1
--- FAIL: TestScript/build_pgo (23.13s)