cmd/go: TestScript/build_cache_link failures

#!watchflakes
default <- pkg == "cmd/go" && test == "TestScript/build_cache_link"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestScript/build_cache_link
=== PAUSE TestScript/build_cache_link
=== CONT  TestScript/build_cache_link
    script_test.go:141: 2026-09-23T02:58:13Z
    script_test.go:143: $WORK=C:\Users\swarming\.swarming\w\ir\x\t\cmd-go-test-3584437829\tmpdir2909459992\build_cache_link3038142378
    script_test.go:165: 
        PATH=C:\Users\swarming\.swarming\w\ir\x\t\cmd-go-test-3584437829\tmpdir2909459992\testbin;C:\Users\swarming\.swarming\w\ir\x\w\goroot\bin;C:\Users\swarming\.swarming\w\ir\x\w\goroot\bin;C:\Users\swarming\.swarming\w\ir\x\w\goroot\bin;C:\Users\swarming\.swarming\w\ir\cache\tools\bin;C:\Users\swarming\.swarming\w\ir\bbagent_utility_packages;C:\Users\swarming\.swarming\w\ir\bbagent_utility_packages\bin;C:\Users\swarming\.swarming\w\ir\cipd_bin_packages;C:\Users\swarming\.swarming\w\ir\cipd_bin_packages\bin;C:\Users\swarming\.swarming\w\ir\cache\cipd_client;C:\Users\swarming\.swarming\w\ir\cache\cipd_client\bin;C:\Users\swarming\.swarming\cipd_cache\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\ProgramData\chocolatey\bin;C:\Users\swarming\AppData\Local\Programs\Python\Python313-arm64\Scripts\;C:\Users\swarming\AppData\Local\Programs\Python\Python313-arm64\;C:\Users\swarming\AppData\Local\Programs\Python\Launcher\;C:\Users\swarming\AppData\Local\Microsoft\WindowsApps;C:\Users\swarming\.swarming\w\ir\cache\tools\cc\windows\gcc64\bin
        USERPROFILE=/no-home
        CCACHE_DISABLE=1
        GOARCH=arm64
...
        go tool pack r "$WORK\\b026\\_pkg_.a" "$WORK\\b026\\_go_.o" # internal
        go tool buildid -w "$WORK\\b026\\_pkg_.a" # internal
        cp "$WORK\\b024\\_pkg_.a" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\t\\cmd-go-test-3584437829\\tmpdir2909459992\\build_cache_link3038142378\\gocache\\d4\\d44fc5b9f1ac4addbb831469aa90efd46061a65d3e7863acd209b301211f4923-d" # internal
        cd C:\Users\swarming\.swarming\w\ir\x\w\goroot\src\internal\runtime\sys
        "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\tool\\windows_arm64\\asm.exe" -p internal/runtime/sys -trimpath "$WORK\\b019=>" -I "$WORK\\b019\\" -I "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\include" -D GOOS_windows -D GOARCH_arm64 -std -o "$WORK\\b019\\dit_arm64.o" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\src\\internal\\runtime\\sys\\dit_arm64.s"
        cp "$WORK\\b020\\_pkg_.a" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\t\\cmd-go-test-3584437829\\tmpdir2909459992\\build_cache_link3038142378\\gocache\\d2\\d2be03a0ef761d19ea29fc6c19a693557b25df261235e1d515818d439c82d9cb-d" # internal
        cd C:\Users\swarming\.swarming\w\ir\x\w\goroot\src\internal\runtime\syscall\windows
        "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\tool\\windows_arm64\\asm.exe" -p internal/runtime/syscall/windows -trimpath "$WORK\\b027=>" -I "$WORK\\b027\\" -I "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\include" -D GOOS_windows -D GOARCH_arm64 -std -o "$WORK\\b027\\asm_windows_arm64.o" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\src\\internal\\runtime\\syscall\\windows\\asm_windows_arm64.s"
    script_test.go:165: FAIL: testdata\script\build_cache_link.txt:8: go build -o NUL -x main.go: exit status 1
--- FAIL: TestScript/build_cache_link (6.19s)

— watchflakes

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/go" && test == "TestScript/build_cache_link"

2026-09-22 22:23 gotip-windows-arm64 go@a532f497 cmd/go.TestScript/build_cache_link (log)

=== RUN   TestScript/build_cache_link
=== PAUSE TestScript/build_cache_link
=== CONT  TestScript/build_cache_link
    script_test.go:141: 2026-09-23T02:58:13Z
    script_test.go:143: $WORK=C:\Users\swarming\.swarming\w\ir\x\t\cmd-go-test-3584437829\tmpdir2909459992\build_cache_link3038142378
    script_test.go:165: 
        PATH=C:\Users\swarming\.swarming\w\ir\x\t\cmd-go-test-3584437829\tmpdir2909459992\testbin;C:\Users\swarming\.swarming\w\ir\x\w\goroot\bin;C:\Users\swarming\.swarming\w\ir\x\w\goroot\bin;C:\Users\swarming\.swarming\w\ir\x\w\goroot\bin;C:\Users\swarming\.swarming\w\ir\cache\tools\bin;C:\Users\swarming\.swarming\w\ir\bbagent_utility_packages;C:\Users\swarming\.swarming\w\ir\bbagent_utility_packages\bin;C:\Users\swarming\.swarming\w\ir\cipd_bin_packages;C:\Users\swarming\.swarming\w\ir\cipd_bin_packages\bin;C:\Users\swarming\.swarming\w\ir\cache\cipd_client;C:\Users\swarming\.swarming\w\ir\cache\cipd_client\bin;C:\Users\swarming\.swarming\cipd_cache\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\ProgramData\chocolatey\bin;C:\Users\swarming\AppData\Local\Programs\Python\Python313-arm64\Scripts\;C:\Users\swarming\AppData\Local\Programs\Python\Python313-arm64\;C:\Users\swarming\AppData\Local\Programs\Python\Launcher\;C:\Users\swarming\AppData\Local\Microsoft\WindowsApps;C:\Users\swarming\.swarming\w\ir\cache\tools\cc\windows\gcc64\bin
        USERPROFILE=/no-home
        CCACHE_DISABLE=1
        GOARCH=arm64
...
        go tool pack r "$WORK\\b026\\_pkg_.a" "$WORK\\b026\\_go_.o" # internal
        go tool buildid -w "$WORK\\b026\\_pkg_.a" # internal
        cp "$WORK\\b024\\_pkg_.a" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\t\\cmd-go-test-3584437829\\tmpdir2909459992\\build_cache_link3038142378\\gocache\\d4\\d44fc5b9f1ac4addbb831469aa90efd46061a65d3e7863acd209b301211f4923-d" # internal
        cd C:\Users\swarming\.swarming\w\ir\x\w\goroot\src\internal\runtime\sys
        "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\tool\\windows_arm64\\asm.exe" -p internal/runtime/sys -trimpath "$WORK\\b019=>" -I "$WORK\\b019\\" -I "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\include" -D GOOS_windows -D GOARCH_arm64 -std -o "$WORK\\b019\\dit_arm64.o" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\src\\internal\\runtime\\sys\\dit_arm64.s"
        cp "$WORK\\b020\\_pkg_.a" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\t\\cmd-go-test-3584437829\\tmpdir2909459992\\build_cache_link3038142378\\gocache\\d2\\d2be03a0ef761d19ea29fc6c19a693557b25df261235e1d515818d439c82d9cb-d" # internal
        cd C:\Users\swarming\.swarming\w\ir\x\w\goroot\src\internal\runtime\syscall\windows
        "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\tool\\windows_arm64\\asm.exe" -p internal/runtime/syscall/windows -trimpath "$WORK\\b027=>" -I "$WORK\\b027\\" -I "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\pkg\\include" -D GOOS_windows -D GOARCH_arm64 -std -o "$WORK\\b027\\asm_windows_arm64.o" "C:\\Users\\swarming\\.swarming\\w\\ir\\x\\w\\goroot\\src\\internal\\runtime\\syscall\\windows\\asm_windows_arm64.s"
    script_test.go:165: FAIL: testdata\script\build_cache_link.txt:8: go build -o NUL -x main.go: exit status 1
--- FAIL: TestScript/build_cache_link (6.19s)

— watchflakes

cc @golang/command-line

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/go" && test == "TestScript/build_cache_link"

2026-10-05 18:46 gotip-darwin-amd64_13 go@899dd4ee cmd/go.TestScript/build_cache_link (log)

=== RUN   TestScript/build_cache_link
=== PAUSE TestScript/build_cache_link
=== CONT  TestScript/build_cache_link
    script_test.go:141: 2026-10-06T09:38:33Z
    script_test.go:143: $WORK=/Users/swarming/.swarming/w/ir/x/t/cmd-go-test-1446409925/tmpdir1920376356/build_cache_link3833999249
    script_test.go:165: 
        PATH=/Users/swarming/.swarming/w/ir/x/t/cmd-go-test-1446409925/tmpdir1920376356/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
...
        GOROOT='/Users/swarming/.swarming/w/ir/x/w/goroot' /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link -o $WORK/b001/exe/a.out -importcfg $WORK/b001/importcfg.link -X=runtime.godebugDefault=containermaxprocs=0,cryptocustomrand=1,decoratemappings=0,gotestjsonbuildtext=1,httpcookiemaxnum=0,httplaxcontentlength=1,httpmuxgo121=1,httpservecontentkeepheaders=1,multipathtcp=0,netmarshal=0,panicnil=1,randseednop=0,rsa1024min=0,tlsmlkem=0,tlssecpmlkem=0,tlssha1=1,tracebacklabels=0,updatemaxprocs=0,urlmaxqueryparams=0,urlstrictcolons=0,winreadlinkvolume=0,winsymlink=0,x509negativeserial=1,x509rsacrt=0,x509sha256skid=0,x509sslcertoverrideplatform=0,x509usepolicies=0 -buildmode=pie -buildid=konB8b69q1dxVv7Uf68a/oMT0yJxAHn778Hbktffv/uDKNb-SS3BP7qrcofYsO/konB8b69q1dxVv7Uf68a -extld=clang $WORK/b001/_pkg_.a
        go tool buildid -w $WORK/b001/exe/a.out # internal
        > stderr '(compile|gccgo)( |\.exe).*main\.go'
        matched: /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/compile -o $WORK/export/b001.a -linkobj $WORK/b001/_go_.o -trimpath "$WORK/b001=>" -p main -lang=go1.28 -complete -buildid oMT0yJxAHn778Hbktffv/oMT0yJxAHn778Hbktffv/oMT0yJxAHn778Hbktffv -goversion go1.28-devel_899dd4ee68e975c2717db50a7e893819468bd006 -c=4 -shared -D _/Users/swarming/.swarming/w/ir/x/t/cmd-go-test-1446409925/tmpdir1920376356/build_cache_link3833999249/gopath/src -importcfg $WORK/b001/importcfg ./main.go
        > stderr '(link|gccgo)( |\.exe)'
        matched: cat >/Users/swarming/.swarming/w/ir/x/t/cmd-go-test-1446409925/tmpdir1920376356/build_cache_link3833999249/tmp/go-build4069175660/b001/importcfg.link << 'EOF' # internal
        # ... and then the linker again ... (0.173s)
        > go build -o $devnull -x main.go
    script_test.go:165: FAIL: testdata/script/build_cache_link.txt:13: go build -o /dev/null -x main.go: signal: quit
--- FAIL: TestScript/build_cache_link (18.48s)

— watchflakes

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/go" && test == "TestScript/build_cache_link"

2026-10-10 04:22 gotip-openbsd-arm64 go@966c78ed cmd/go.TestScript/build_cache_link (log)

=== RUN   TestScript/build_cache_link
=== PAUSE TestScript/build_cache_link
=== CONT  TestScript/build_cache_link
    script_test.go:141: 2026-10-10T21:27:10Z
    script_test.go:143: $WORK=/home/swarming/.swarming/w/ir/x/t/cmd-go-test-4280155691/tmpdir2580706301/build_cache_link474339515
    script_test.go:165: 
        PATH=/home/swarming/.swarming/w/ir/x/t/cmd-go-test-4280155691/tmpdir2580706301/testbin:/home/swarming/.swarming/w/ir/x/w/goroot/bin:/home/swarming/.swarming/w/ir/x/w/goroot/bin:/home/swarming/.swarming/w/ir/x/w/goroot/bin:/home/swarming/.swarming/w/ir/cache/tools/bin:/home/swarming/.swarming/w/ir/bbagent_utility_packages:/home/swarming/.swarming/w/ir/bbagent_utility_packages/bin:/home/swarming/.swarming/w/ir/cipd_bin_packages:/home/swarming/.swarming/w/ir/cipd_bin_packages/bin:/home/swarming/.swarming/w/ir/cache/cipd_client:/home/swarming/.swarming/w/ir/cache/cipd_client/bin:/home/swarming/.swarming/cipd_cache/bin:/home/swarming/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin
        HOME=/no-home
        CCACHE_DISABLE=1
        GOARCH=arm64
...
        r26     0x9f94a0
        r27     0xffffffffffffffc0
        r28     0x4982852c0
        r29     0x4509bfb88
        lr      0xa975f4
        sp      0x4509bfb90
        pc      0x40aa08b0c
        fault   0x0
    script_test.go:165: FAIL: testdata/script/build_cache_link.txt:18: go build -o main -x main.go: exit status 2
--- FAIL: TestScript/build_cache_link (28.83s)

— watchflakes

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cmd/go: TestScript/build_cache_link failures #81712

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cmd/go: TestScript/build_cache_link failures #81712

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