<p dir="auto">This doesn't happen every time.</p>
<p dir="auto">Using tip (<a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/golang/go/commit/bbc4351eca2ff435106566497cef0fa15566c42a/hovercard" href="https://github.com/golang/go/commit/bbc4351eca2ff435106566497cef0fa15566c42a"><tt>bbc4351</tt></a>).</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="# crypto/x509
panic: runtime error: slice bounds out of range
fatal error: panic on system stack

runtime stack:
runtime.throw(0x854ad0, 0x15)
    /home/ksh/work/os-code/go/src/runtime/panic.go:527 +0x96
runtime.gopanic(0x7ce940, 0xc20800e150)
    /home/ksh/work/os-code/go/src/runtime/panic.go:354 +0xb9
runtime.panicslice()
    /home/ksh/work/os-code/go/src/runtime/panic.go:18 +0x49
runtime.gcInstallStackBarrier(0xc208000160, 0xc2084b1c78)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:510 +0xae
runtime.scanstack.func1(0xc2084b1c78, 0x0, 0x1)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:365 +0x9f
runtime.gentraceback(0x75d275, 0xc2080911b0, 0x0, 0xc208000160, 0x0, 0x0, 0x7fffffff, 0xc2084b1d90, 0x0, 0x0, ...)
    /home/ksh/work/os-code/go/src/runtime/traceback.go:336 +0xa7e
runtime.scanstack(0xc208000160)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:380 +0x34e
runtime.gcphasework(0xc208000160)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:273 +0x6d
runtime.stopg(0xc208000160, 0x3)
    /home/ksh/work/os-code/go/src/runtime/proc1.go:395 +0x8e
runtime.markroot(0xc208020000, 0x5)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:138 +0x1ef
runtime.parfordo(0xc208020000)
    /home/ksh/work/os-code/go/src/runtime/parfor.go:95 +0x12a
runtime.gcscan_m()
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:37 +0xde
runtime.gc.func1()
    /home/ksh/work/os-code/go/src/runtime/mgc.go:843 +0x5c
runtime.systemstack(0xc208026000)
    /home/ksh/work/os-code/go/src/runtime/asm_amd64.s:262 +0x7c
runtime.mstart()
    /home/ksh/work/os-code/go/src/runtime/proc1.go:656

goroutine 5 [garbage collection scan]:
runtime.systemstack_switch()
    /home/ksh/work/os-code/go/src/runtime/asm_amd64.s:216 fp=0xc20802fce8 sp=0xc20802fce0
runtime.gc(0x0)
    /home/ksh/work/os-code/go/src/runtime/mgc.go:855 +0x1d9 fp=0xc20802ff90 sp=0xc20802fce8
runtime.backgroundgc()
    /home/ksh/work/os-code/go/src/runtime/mgc.go:775 +0x3d fp=0xc20802ffc0 sp=0xc20802ff90
runtime.goexit()
    /home/ksh/work/os-code/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc20802ffc8 sp=0xc20802ffc0
created by runtime.startGC
    /home/ksh/work/os-code/go/src/runtime/mgc.go:748 +0x147

goroutine 1 [syscall]:
syscall.Syscall(0x4, 0xc20849bef0, 0xc2085886c0, 0x0, 0xffffffffffffffff, 0x0, 0x2)
    /home/ksh/work/os-code/go/src/syscall/asm_linux_amd64.s:18 +0x5
syscall.Stat(0xc20849be30, 0x25, 0xc2085886c0, 0x0, 0x0)
    /home/ksh/work/os-code/go/src/syscall/zsyscall_linux_amd64.go:1529 +0x8b
os.Stat(0xc20849be30, 0x25, 0x0, 0x0, 0x0, 0x0)
    /home/ksh/work/os-code/go/src/os/file_unix.go:154 +0x6a
cmd/internal/obj.Access(0xc20849be30, 0x25, 0x0, 0x2)
    /home/ksh/work/os-code/go/src/cmd/internal/obj/util.go:173 +0x8e
cmd/compile/internal/gc.findpkg(0xc20845a3f0, 0xc, 0xc20849be30, 0x25, 0xc9a300)
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:605 +0x8a9
cmd/compile/internal/gc.importfile(0xc208092a50, 0x26a)
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:711 +0xc2d
cmd/compile/internal/gc.(*yyParserImpl).Parse(0xc208032038, 0x7fbad15be728, 0xdc0e10, 0x0)
    go.y:292 +0x2008
cmd/compile/internal/gc.yyparse()
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:1822 +0xb4
cmd/compile/internal/gc.Main()
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:345 +0x1b35
cmd/compile/internal/amd64.Main()
    /home/ksh/work/os-code/go/src/cmd/compile/internal/amd64/galign.go:127 +0x58d
main.main()
    /home/ksh/work/os-code/go/src/cmd/compile/main.go:26 +0x189
ok      crypto/sha512   0.003s
ok      crypto/subtle   0.005s
ok      crypto/tls  1.769s
FAIL    crypto/x509 [build failed]
ok      database/sql    0.048s
ok      database/sql/driver 0.005s
ok      debug/dwarf 0.015s
"><pre class="notranslate"><code class="notranslate"># crypto/x509
panic: runtime error: slice bounds out of range
fatal error: panic on system stack

runtime stack:
runtime.throw(0x854ad0, 0x15)
    /home/ksh/work/os-code/go/src/runtime/panic.go:527 +0x96
runtime.gopanic(0x7ce940, 0xc20800e150)
    /home/ksh/work/os-code/go/src/runtime/panic.go:354 +0xb9
runtime.panicslice()
    /home/ksh/work/os-code/go/src/runtime/panic.go:18 +0x49
runtime.gcInstallStackBarrier(0xc208000160, 0xc2084b1c78)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:510 +0xae
runtime.scanstack.func1(0xc2084b1c78, 0x0, 0x1)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:365 +0x9f
runtime.gentraceback(0x75d275, 0xc2080911b0, 0x0, 0xc208000160, 0x0, 0x0, 0x7fffffff, 0xc2084b1d90, 0x0, 0x0, ...)
    /home/ksh/work/os-code/go/src/runtime/traceback.go:336 +0xa7e
runtime.scanstack(0xc208000160)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:380 +0x34e
runtime.gcphasework(0xc208000160)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:273 +0x6d
runtime.stopg(0xc208000160, 0x3)
    /home/ksh/work/os-code/go/src/runtime/proc1.go:395 +0x8e
runtime.markroot(0xc208020000, 0x5)
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:138 +0x1ef
runtime.parfordo(0xc208020000)
    /home/ksh/work/os-code/go/src/runtime/parfor.go:95 +0x12a
runtime.gcscan_m()
    /home/ksh/work/os-code/go/src/runtime/mgcmark.go:37 +0xde
runtime.gc.func1()
    /home/ksh/work/os-code/go/src/runtime/mgc.go:843 +0x5c
runtime.systemstack(0xc208026000)
    /home/ksh/work/os-code/go/src/runtime/asm_amd64.s:262 +0x7c
runtime.mstart()
    /home/ksh/work/os-code/go/src/runtime/proc1.go:656

goroutine 5 [garbage collection scan]:
runtime.systemstack_switch()
    /home/ksh/work/os-code/go/src/runtime/asm_amd64.s:216 fp=0xc20802fce8 sp=0xc20802fce0
runtime.gc(0x0)
    /home/ksh/work/os-code/go/src/runtime/mgc.go:855 +0x1d9 fp=0xc20802ff90 sp=0xc20802fce8
runtime.backgroundgc()
    /home/ksh/work/os-code/go/src/runtime/mgc.go:775 +0x3d fp=0xc20802ffc0 sp=0xc20802ff90
runtime.goexit()
    /home/ksh/work/os-code/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc20802ffc8 sp=0xc20802ffc0
created by runtime.startGC
    /home/ksh/work/os-code/go/src/runtime/mgc.go:748 +0x147

goroutine 1 [syscall]:
syscall.Syscall(0x4, 0xc20849bef0, 0xc2085886c0, 0x0, 0xffffffffffffffff, 0x0, 0x2)
    /home/ksh/work/os-code/go/src/syscall/asm_linux_amd64.s:18 +0x5
syscall.Stat(0xc20849be30, 0x25, 0xc2085886c0, 0x0, 0x0)
    /home/ksh/work/os-code/go/src/syscall/zsyscall_linux_amd64.go:1529 +0x8b
os.Stat(0xc20849be30, 0x25, 0x0, 0x0, 0x0, 0x0)
    /home/ksh/work/os-code/go/src/os/file_unix.go:154 +0x6a
cmd/internal/obj.Access(0xc20849be30, 0x25, 0x0, 0x2)
    /home/ksh/work/os-code/go/src/cmd/internal/obj/util.go:173 +0x8e
cmd/compile/internal/gc.findpkg(0xc20845a3f0, 0xc, 0xc20849be30, 0x25, 0xc9a300)
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:605 +0x8a9
cmd/compile/internal/gc.importfile(0xc208092a50, 0x26a)
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:711 +0xc2d
cmd/compile/internal/gc.(*yyParserImpl).Parse(0xc208032038, 0x7fbad15be728, 0xdc0e10, 0x0)
    go.y:292 +0x2008
cmd/compile/internal/gc.yyparse()
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:1822 +0xb4
cmd/compile/internal/gc.Main()
    /home/ksh/work/os-code/go/src/cmd/compile/internal/gc/lex.go:345 +0x1b35
cmd/compile/internal/amd64.Main()
    /home/ksh/work/os-code/go/src/cmd/compile/internal/amd64/galign.go:127 +0x58d
main.main()
    /home/ksh/work/os-code/go/src/cmd/compile/main.go:26 +0x189
ok      crypto/sha512   0.003s
ok      crypto/subtle   0.005s
ok      crypto/tls  1.769s
FAIL    crypto/x509 [build failed]
ok      database/sql    0.048s
ok      database/sql/driver 0.005s
ok      debug/dwarf 0.015s

</code></pre></div>
<p dir="auto">Not sure if it is related but also getting the following test failure (consistently):</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="ok      cmd/fix 0.075s
--- FAIL: TestNoteReading-4 (11.84s)
    note_test.go:46: buildID in hello binary = &quot;&quot;, want &quot;TestNoteReading-Build-ID&quot;
FAIL
FAIL    cmd/go  19.592s"><pre class="notranslate"><code class="notranslate">ok      cmd/fix 0.075s
--- FAIL: TestNoteReading-4 (11.84s)
    note_test.go:46: buildID in hello binary = "", want "TestNoteReading-Build-ID"
FAIL
FAIL    cmd/go  19.592s
</code></pre></div>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="##### GOMAXPROCS=2 runtime -cpu=1,2,4
--- FAIL: TestStackOverflow (0.04s)
    crash_test.go:92: building source: exit status 2
        panic: runtime error: slice bounds out of range
        fatal error: panic on system stack

        runtime stack:
        runtime.throw(0x985d70, 0x15)
            /tmp/buildlet-scatch465833892/go/src/runtime/panic.go:527 +0x96
        runtime.gopanic(0x891b00, 0xc208010190)
            /tmp/buildlet-scatch465833892/go/src/runtime/panic.go:354 +0xbc
        runtime.panicslice()
            /tmp/buildlet-scatch465833892/go/src/runtime/panic.go:18 +0x50
        runtime.gcInstallStackBarrier(0xc20863c9a0, 0xc208033c78)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:510 +0xb1
        runtime.scanstack.func1(0xc208033c78, 0x0, 0x1)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:365 +0xa2
        runtime.gentraceback(0x6286a5, 0xc2080fca18, 0x0, 0xc20863c9a0, 0x0, 0x0, 0x7fffffff, 0xc208033d90, 0x0, 0x0, ...)
            /tmp/buildlet-scatch465833892/go/src/runtime/traceback.go:336 +0xa81
        runtime.scanstack(0xc20863c9a0)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:380 +0x351
        runtime.gcphasework(0xc20863c9a0)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:273 +0x70
        runtime.stopg(0xc20863c9a0, 0x3)
            /tmp/buildlet-scatch465833892/go/src/runtime/proc1.go:395 +0x91
        runtime.markroot(0xc208018000, 0xd)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:138 +0x1f2
        runtime.parfordo(0xc208018000)
            /tmp/buildlet-scatch465833892/go/src/runtime/parfor.go:95 +0x12d
        runtime.gcscan_m()
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:37 +0xe1
        runtime.gc.func1()
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:843 +0x5f
        runtime.systemstack(0xc20801b500)
            /tmp/buildlet-scatch465833892/go/src/runtime/asm_amd64.s:262 +0x7c
        runtime.mstart()
            /tmp/buildlet-scatch465833892/go/src/runtime/proc1.go:656

        goroutine 21 [garbage collection scan]:
        runtime.systemstack_switch()
            /tmp/buildlet-scatch465833892/go/src/runtime/asm_amd64.s:216 fp=0xc2080204e8 sp=0xc2080204e0
        runtime.gc(0x0)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:855 +0x1dc fp=0xc208020790 sp=0xc2080204e8
        runtime.backgroundgc()
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:775 +0x40 fp=0xc2080207c0 sp=0xc208020790
        runtime.goexit()
            /tmp/buildlet-scatch465833892/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc2080207c8 sp=0xc2080207c0
        created by runtime.startGC
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:748 +0x14a

        goroutine 1 [semacquire]:
        sync.runtime_Semacquire(0xc208617360)
            /tmp/buildlet-scatch465833892/go/src/runtime/sema.go:43 +0x2d
        sync.(*WaitGroup).Wait(0xc2086495a0)
            /tmp/buildlet-scatch465833892/go/src/sync/waitgroup.go:132 +0x15d
        main.(*builder).do(0xc2081399d0, 0xc208112d00)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1153 +0x3c9
        main.runBuild(0xb90360, 0xc208056130, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:441 +0x51f
        main.main()
            /tmp/buildlet-scatch465833892/go/src/cmd/go/main.go:177 +0x750

        goroutine 19 [syscall]:
        os/signal.loop()
            /tmp/buildlet-scatch465833892/go/src/os/signal/signal_unix.go:22 +0x1f
        created by os/signal.init.1
            /tmp/buildlet-scatch465833892/go/src/os/signal/signal_unix.go:28 +0x3e

        goroutine 23 [syscall]:
        syscall.Syscall(0x0, 0x6, 0xc2080fcae0, 0x8, 0x0, 0x8, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/asm_linux_amd64.s:18 +0x5
        syscall.readlen(0x6, 0xc2080fcae0, 0x8, 0xf, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/zsyscall_linux_amd64.go:1085 +0x53
        syscall.forkExec(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fccb0, 0x15d4, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/exec_unix.go:200 +0x56a
        syscall.StartProcess(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fccb0, 0x1, 0x4, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/exec_unix.go:238 +0x6e
        os.startProcess(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fcee8, 0x90a160, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/exec_posix.go:45 +0x33f
        os.StartProcess(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fcee8, 0x0, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/doc.go:24 +0x6c
        os/exec.(*Cmd).Start(0xc208670000, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/exec/exec.go:319 +0x76a
        os/exec.(*Cmd).Run(0xc208670000, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/exec/exec.go:246 +0x34
        main.(*builder).runOut(0xc2081399d0, 0xc208127100, 0x16, 0xc208127080, 0x17, 0x0, 0x0, 0x0, 0xc20866c000, 0xd, ...)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1902 +0x334
        main.gcToolchain.gc(0xc2081399d0, 0xc208125400, 0xc208644b40, 0x30, 0xc20865e200, 0x34, 0xc208172600, 0xc20800e540, 0x2, 0x2, ...)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:2146 +0xf1e
        main.(*gcToolchain).gc(0xbbcf70, 0xc2081399d0, 0xc208125400, 0xc208644b40, 0x30, 0xc20865e200, 0x34, 0x0, 0xc20800e540, 0x2, ...)
            &lt;autogenerated&gt;:3 +0x191
        main.(*builder).build(0xc2081399d0, 0xc208112d00, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1320 +0x2551
        main.(*builder).do.func1(0xc208112d00)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1087 +0x3bc
        main.(*builder).do.func2(0xc2086495a0, 0xc2081399d0, 0xc208649580)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1144 +0x158
        created by main.(*builder).do
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1150 +0x3a1

        goroutine 24 [select]:
        main.(*builder).do.func2(0xc2086495a0, 0xc2081399d0, 0xc208649580)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1134 +0x1d1
        created by main.(*builder).do
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1150 +0x3a1
FAIL
FAIL    runtime 25.490s"><pre class="notranslate"><code class="notranslate">##### GOMAXPROCS=2 runtime -cpu=1,2,4
--- FAIL: TestStackOverflow (0.04s)
    crash_test.go:92: building source: exit status 2
        panic: runtime error: slice bounds out of range
        fatal error: panic on system stack

        runtime stack:
        runtime.throw(0x985d70, 0x15)
            /tmp/buildlet-scatch465833892/go/src/runtime/panic.go:527 +0x96
        runtime.gopanic(0x891b00, 0xc208010190)
            /tmp/buildlet-scatch465833892/go/src/runtime/panic.go:354 +0xbc
        runtime.panicslice()
            /tmp/buildlet-scatch465833892/go/src/runtime/panic.go:18 +0x50
        runtime.gcInstallStackBarrier(0xc20863c9a0, 0xc208033c78)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:510 +0xb1
        runtime.scanstack.func1(0xc208033c78, 0x0, 0x1)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:365 +0xa2
        runtime.gentraceback(0x6286a5, 0xc2080fca18, 0x0, 0xc20863c9a0, 0x0, 0x0, 0x7fffffff, 0xc208033d90, 0x0, 0x0, ...)
            /tmp/buildlet-scatch465833892/go/src/runtime/traceback.go:336 +0xa81
        runtime.scanstack(0xc20863c9a0)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:380 +0x351
        runtime.gcphasework(0xc20863c9a0)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:273 +0x70
        runtime.stopg(0xc20863c9a0, 0x3)
            /tmp/buildlet-scatch465833892/go/src/runtime/proc1.go:395 +0x91
        runtime.markroot(0xc208018000, 0xd)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:138 +0x1f2
        runtime.parfordo(0xc208018000)
            /tmp/buildlet-scatch465833892/go/src/runtime/parfor.go:95 +0x12d
        runtime.gcscan_m()
            /tmp/buildlet-scatch465833892/go/src/runtime/mgcmark.go:37 +0xe1
        runtime.gc.func1()
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:843 +0x5f
        runtime.systemstack(0xc20801b500)
            /tmp/buildlet-scatch465833892/go/src/runtime/asm_amd64.s:262 +0x7c
        runtime.mstart()
            /tmp/buildlet-scatch465833892/go/src/runtime/proc1.go:656

        goroutine 21 [garbage collection scan]:
        runtime.systemstack_switch()
            /tmp/buildlet-scatch465833892/go/src/runtime/asm_amd64.s:216 fp=0xc2080204e8 sp=0xc2080204e0
        runtime.gc(0x0)
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:855 +0x1dc fp=0xc208020790 sp=0xc2080204e8
        runtime.backgroundgc()
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:775 +0x40 fp=0xc2080207c0 sp=0xc208020790
        runtime.goexit()
            /tmp/buildlet-scatch465833892/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc2080207c8 sp=0xc2080207c0
        created by runtime.startGC
            /tmp/buildlet-scatch465833892/go/src/runtime/mgc.go:748 +0x14a

        goroutine 1 [semacquire]:
        sync.runtime_Semacquire(0xc208617360)
            /tmp/buildlet-scatch465833892/go/src/runtime/sema.go:43 +0x2d
        sync.(*WaitGroup).Wait(0xc2086495a0)
            /tmp/buildlet-scatch465833892/go/src/sync/waitgroup.go:132 +0x15d
        main.(*builder).do(0xc2081399d0, 0xc208112d00)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1153 +0x3c9
        main.runBuild(0xb90360, 0xc208056130, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:441 +0x51f
        main.main()
            /tmp/buildlet-scatch465833892/go/src/cmd/go/main.go:177 +0x750

        goroutine 19 [syscall]:
        os/signal.loop()
            /tmp/buildlet-scatch465833892/go/src/os/signal/signal_unix.go:22 +0x1f
        created by os/signal.init.1
            /tmp/buildlet-scatch465833892/go/src/os/signal/signal_unix.go:28 +0x3e

        goroutine 23 [syscall]:
        syscall.Syscall(0x0, 0x6, 0xc2080fcae0, 0x8, 0x0, 0x8, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/asm_linux_amd64.s:18 +0x5
        syscall.readlen(0x6, 0xc2080fcae0, 0x8, 0xf, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/zsyscall_linux_amd64.go:1085 +0x53
        syscall.forkExec(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fccb0, 0x15d4, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/exec_unix.go:200 +0x56a
        syscall.StartProcess(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fccb0, 0x1, 0x4, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/syscall/exec_unix.go:238 +0x6e
        os.startProcess(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fcee8, 0x90a160, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/exec_posix.go:45 +0x33f
        os.StartProcess(0xc20800a880, 0x3d, 0xc20866e0e0, 0xe, 0xe, 0xc2080fcee8, 0x0, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/doc.go:24 +0x6c
        os/exec.(*Cmd).Start(0xc208670000, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/exec/exec.go:319 +0x76a
        os/exec.(*Cmd).Run(0xc208670000, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/os/exec/exec.go:246 +0x34
        main.(*builder).runOut(0xc2081399d0, 0xc208127100, 0x16, 0xc208127080, 0x17, 0x0, 0x0, 0x0, 0xc20866c000, 0xd, ...)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1902 +0x334
        main.gcToolchain.gc(0xc2081399d0, 0xc208125400, 0xc208644b40, 0x30, 0xc20865e200, 0x34, 0xc208172600, 0xc20800e540, 0x2, 0x2, ...)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:2146 +0xf1e
        main.(*gcToolchain).gc(0xbbcf70, 0xc2081399d0, 0xc208125400, 0xc208644b40, 0x30, 0xc20865e200, 0x34, 0x0, 0xc20800e540, 0x2, ...)
            &lt;autogenerated&gt;:3 +0x191
        main.(*builder).build(0xc2081399d0, 0xc208112d00, 0x0, 0x0)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1320 +0x2551
        main.(*builder).do.func1(0xc208112d00)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1087 +0x3bc
        main.(*builder).do.func2(0xc2086495a0, 0xc2081399d0, 0xc208649580)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1144 +0x158
        created by main.(*builder).do
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1150 +0x3a1

        goroutine 24 [select]:
        main.(*builder).do.func2(0xc2086495a0, 0xc2081399d0, 0xc208649580)
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1134 +0x1d1
        created by main.(*builder).do
            /tmp/buildlet-scatch465833892/go/src/cmd/go/build.go:1150 +0x3a1
FAIL
FAIL    runtime 25.490s
</code></pre></div>
<p dir="auto"><a href="http://build.golang.org/log/de2894c6b3b2b342cb66bd859be2c197e8e641ad" rel="nofollow">http://build.golang.org/log/de2894c6b3b2b342cb66bd859be2c197e8e641ad</a></p>
<p dir="auto">/cc <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/aclements/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/aclements">@aclements</a></p>