cmd/cgo/internal/testcarchive: TestInstall failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestInstall
    carchive_test.go:487: [go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test2618922230/_obj2378614451 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: # testcarchive/libgo
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running ar failed: signal: bus error
        
    carchive_test.go:489: exit status 1
--- FAIL: TestInstall (18.52s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2024-04-25 17:49 gotip-darwin-amd64_13 go@fd99157f cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test2618922230/_obj2378614451 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: # testcarchive/libgo
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running ar failed: signal: bus error
        
    carchive_test.go:489: exit status 1
--- FAIL: TestInstall (18.52s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2024-04-26 16:29 go1.22-darwin-amd64_13 release-branch.go1.22@a7ff78d5 cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test1598377457/_obj704097410 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: [clang -fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/Users/swarming/.swarming/w/ir/x/t/go-build2331817794=/tmp/go-build -gno-record-gcc-switches -fno-common -I /Users/swarming/.swarming/w/ir/x/t/carchive_test1598377457/pkg/darwin_amd64/testcarchive -o ./testp1 main.c main_unix.c /Users/swarming/.swarming/w/ir/x/t/carchive_test1598377457/pkg/darwin_amd64/testcarchive/libgo.a]
    carchive_test.go:496: [go build -buildmode=c-archive libgo/libgo.go]
    carchive_test.go:496: # command-line-arguments
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running ar failed: signal: bus error
        
    carchive_test.go:496: exit status 1
--- FAIL: TestInstall (27.64s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2024-04-26 15:38 gotip-darwin-amd64_13 go@deeebf56 cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test2280167171/_obj3767255372 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: [clang -fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/Users/swarming/.swarming/w/ir/x/t/go-build2447395773=/tmp/go-build -gno-record-gcc-switches -fno-common -I /Users/swarming/.swarming/w/ir/x/t/carchive_test2280167171/pkg/darwin_amd64/testcarchive -o ./testp1 main.c main_unix.c /Users/swarming/.swarming/w/ir/x/t/carchive_test2280167171/pkg/darwin_amd64/testcarchive/libgo.a]
    carchive_test.go:496: [go build -buildmode=c-archive libgo/libgo.go]
    carchive_test.go:496: # command-line-arguments
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running ar failed: signal: bus error
        
    carchive_test.go:496: exit status 1
--- FAIL: TestInstall (32.39s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2025-08-06 18:36 gotip-darwin-amd64-longtest go@a3895fe9 cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [/Users/swarming/.swarming/w/ir/x/w/goroot/bin/go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test1005919771/_obj451304933 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: # testcarchive/libgo
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar failed: exit status 1
        /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000001.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000002.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000003.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000013.o) has no symbols
        fatal error: /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: can't write to output file (Device error)
        /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: internal ranlib command failed
        
    carchive_test.go:489: exit status 1
--- FAIL: TestInstall (13.05s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2025-09-26 06:48 gotip-windows-386 go@fdea7da3 cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [C:\b\s\w\ir\x\w\goroot\bin\go.exe tool cgo -objdir C:\b\s\w\ir\x\t\carchive_test1340858684\_obj2189471940 -exportheader p.h p\p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: [gcc -m32 -mthreads -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=C:\b\s\w\ir\x\t\go-build2124753656=/tmp/go-build -gno-record-gcc-switches -I C:\b\s\w\ir\x\t\carchive_test1340858684\pkg\windows_386\testcarchive -o ./testp1.exe main.c main_windows.c C:\b\s\w\ir\x\t\carchive_test1340858684\pkg\windows_386\testcarchive\libgo.a -lntdll -lws2_32 -lwinmm]
    carchive_test.go:489: ld.lld: error: undefined symbol: _runtime.libpreinit
        >>> referenced by C:/b/s/w/ir/x/w/goroot/src/runtime/asm_386.s:40
        >>>               libgo.a(go.o):(_rt0_386_lib)
        clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
    carchive_test.go:489: exit status 1
--- FAIL: TestInstall (7.49s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2025-10-20 19:50 gotip-darwin-amd64_13 go@29a81624 cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [/Users/swarming/.swarming/w/ir/x/w/goroot/bin/go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test2561387423/_obj2780751571 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: # testcarchive/libgo
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar failed: exit status 1
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000001.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000002.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000003.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000013.o) has no symbols
        fatal error: /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: can't write to output file (Device error)
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: internal ranlib command failed
        
    carchive_test.go:489: exit status 1
--- FAIL: TestInstall (32.41s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2025-10-25 01:10 gotip-darwin-amd64_13 go@f2dd3d7e cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [/Users/swarming/.swarming/w/ir/x/w/goroot/bin/go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test4008109298/_obj3100225689 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: # testcarchive/libgo
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar failed: exit status 1
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000001.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000002.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000003.o) has no symbols
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: $WORK/b001/exe/a.out.a(000013.o) has no symbols
        fatal error: /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: can't write to output file (Device error)
        /Users/swarming/.swarming/w/ir/cache/tools/15c500b/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: internal ranlib command failed
        
    carchive_test.go:489: exit status 1
--- FAIL: TestInstall (46.20s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2026-02-12 04:16 gotip-darwin-amd64_13 go@54c46328 cmd/cgo/internal/testcarchive.TestInstall (log)

=== RUN   TestInstall
    carchive_test.go:487: [/Users/swarming/.swarming/w/ir/x/w/goroot/bin/go tool cgo -objdir /Users/swarming/.swarming/w/ir/x/t/carchive_test2476648987/_obj2475262642 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: # runtime
        unexpected fault address 0xb01dfacedebac1e
        fatal error: fault
        [signal SIGSEGV: segmentation violation code=0x1 addr=0xb01dfacedebac1e pc=0xa0d1c0f]
        
        goroutine 173 gp=0x3c2210e83860 m=5 mp=0x3c2210d95808 [running]:
        runtime.throw({0xa3dda96?, 0x9a9a448?})
...
        cmd/compile/internal/ssagen.Compile(0x3c2215602a00, 0x3, 0x3c221255cc18?)
        	cmd/compile/internal/ssagen/pgen.go:304 +0x88 fp=0x3c2214c97f40 sp=0x3c2214c97e68 pc=0xa0d4cc8
        cmd/compile/internal/gc.compileFunctions.func2()
        	cmd/compile/internal/gc/compile.go:177 +0x85 fp=0x3c2214c97fe0 sp=0x3c2214c97f40 pc=0xa39bb25
        runtime.goexit({})
        	runtime/asm_amd64.s:1774 +0x1 fp=0x3c2214c97fe8 sp=0x3c2214c97fe0 pc=0x9933281
        created by cmd/compile/internal/gc.compileFunctions in goroutine 1
        	cmd/compile/internal/gc/compile.go:163 +0xd9
    carchive_test.go:489: exit status 1
--- FAIL: TestInstall (11.75s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2026-05-20 16:22 gotip-freebsd-amd64-race go@71300e80 cmd/cgo/internal/testcarchive.TestInstall [SKIP] (log)

=== RUN   TestInstall
    carchive_test.go:487: [/home/swarming/.swarming/w/ir/x/w/goroot/bin/go tool cgo -objdir /home/swarming/.swarming/w/ir/x/t/carchive_test860805713/_obj1010011843 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: [clang -fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/home/swarming/.swarming/w/ir/x/t/go-build3428653932=/tmp/go-build -gno-record-gcc-switches -I /home/swarming/.swarming/w/ir/x/t/carchive_test860805713/pkg/freebsd_amd64_shared/testcarchive -o ./testp1 main.c main_unix.c /home/swarming/.swarming/w/ir/x/t/carchive_test860805713/pkg/freebsd_amd64_shared/testcarchive/libgo.a]
    carchive_test.go:496: [go build -buildmode=c-archive libgo/libgo.go]
    carchive_test.go:496: [clang -fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/home/swarming/.swarming/w/ir/x/t/go-build3428653932=/tmp/go-build -gno-record-gcc-switches -I /home/swarming/.swarming/w/ir/x/t/carchive_test860805713/pkg/freebsd_amd64_shared/testcarchive -o ./testp2 main.c main_unix.c libgo.a]
    carchive_test.go:499: [go build -buildmode=c-archive -o libgo.a ./libgo]
    carchive_test.go:499: [clang -fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/home/swarming/.swarming/w/ir/x/t/go-build3428653932=/tmp/go-build -gno-record-gcc-switches -I /home/swarming/.swarming/w/ir/x/t/carchive_test860805713/pkg/freebsd_amd64_shared/testcarchive -o ./testp3 main.c main_unix.c libgo.a]
panic: test timed out after 6m0s
	running tests:
...
os/exec.(*Cmd).writerDescriptor.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:613 +0x5b fp=0xc000181f50 sp=0xc000181ee0 pc=0x5b34bb
os/exec.(*Cmd).Start.func2(0xc000136140)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:768 +0x3d fp=0xc000181fb8 sp=0xc000181f50 pc=0x5b361d
os/exec.(*Cmd).Start.gowrap1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:780 +0x39 fp=0xc000181fe0 sp=0xc000181fb8 pc=0x5b35b9
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1264 +0x1 fp=0xc000181fe8 sp=0xc000181fe0 pc=0x4db081
created by os/exec.(*Cmd).Start in goroutine 32
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:767 +0x10f2

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2026-05-21 18:15 gotip-freebsd-amd64 go@399bc412 cmd/cgo/internal/testcarchive.TestInstall [SKIP] (log)

=== RUN   TestInstall
    carchive_test.go:487: [/home/swarming/.swarming/w/ir/x/w/goroot/bin/go tool cgo -objdir /home/swarming/.swarming/w/ir/x/t/carchive_test4269620253/_obj540635710 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: [clang -fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/home/swarming/.swarming/w/ir/x/t/go-build1977228049=/tmp/go-build -gno-record-gcc-switches -I /home/swarming/.swarming/w/ir/x/t/carchive_test4269620253/pkg/freebsd_amd64_shared/testcarchive -o ./testp1 main.c main_unix.c /home/swarming/.swarming/w/ir/x/t/carchive_test4269620253/pkg/freebsd_amd64_shared/testcarchive/libgo.a]
    carchive_test.go:496: [go build -buildmode=c-archive libgo/libgo.go]
panic: test timed out after 3m0s
	running tests:
		TestInstall (3m0s)

goroutine 35 gp=0x86c573a40 m=3 mp=0x86c4f3008 [running]:
...
os/exec.(*Cmd).writerDescriptor.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:613 +0x34 fp=0x86c707f60 sp=0x86c707f00 pc=0x4fb7b4
os/exec.(*Cmd).Start.func2(0x0?)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:768 +0x2c fp=0x86c707fc8 sp=0x86c707f60 pc=0x4fc38c
os/exec.(*Cmd).Start.gowrap1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:780 +0x1b fp=0x86c707fe0 sp=0x86c707fc8 pc=0x4fc33b
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1259 +0x1 fp=0x86c707fe8 sp=0x86c707fe0 pc=0x4859c1
created by os/exec.(*Cmd).Start in goroutine 19
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:767 +0x92e

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testcarchive" && test == "TestInstall"

2026-08-05 19:42 go1.25-freebsd-amd64 release-branch.go1.25@b60d45bf cmd/cgo/internal/testcarchive.TestInstall [SKIP] (log)

=== RUN   TestInstall
    carchive_test.go:487: [/home/swarming/.swarming/w/ir/x/w/goroot/bin/go tool cgo -objdir /home/swarming/.swarming/w/ir/x/t/carchive_test2757652266/_obj3753411386 -exportheader p.h p/p.go]
    carchive_test.go:489: [go install -buildmode=c-archive ./libgo]
    carchive_test.go:489: [clang -fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/home/swarming/.swarming/w/ir/x/t/go-build2926575852=/tmp/go-build -gno-record-gcc-switches -I /home/swarming/.swarming/w/ir/x/t/carchive_test2757652266/pkg/freebsd_amd64_shared/testcarchive -o ./testp1 main.c main_unix.c /home/swarming/.swarming/w/ir/x/t/carchive_test2757652266/pkg/freebsd_amd64_shared/testcarchive/libgo.a]
    carchive_test.go:496: [go build -buildmode=c-archive libgo/libgo.go]
panic: test timed out after 3m0s
	running tests:
		TestInstall (3m0s)

goroutine 31 gp=0x86c130e00 m=0 mp=0x72f640 [running]:
...
os/exec.(*Cmd).writerDescriptor.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:596 +0x34 fp=0x86c067760 sp=0x86c067700 pc=0x4f9c54
os/exec.(*Cmd).Start.func2(0x0?)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:749 +0x2c fp=0x86c0677c8 sp=0x86c067760 pc=0x4fa88c
os/exec.(*Cmd).Start.gowrap1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:761 +0x24 fp=0x86c0677e0 sp=0x86c0677c8 pc=0x4fa824
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:1693 +0x1 fp=0x86c0677e8 sp=0x86c0677e0 pc=0x47be61
created by os/exec.(*Cmd).Start in goroutine 12
	/home/swarming/.swarming/w/ir/x/w/goroot/src/os/exec/exec.go:748 +0x935

— watchflakes