unexpected fault address 0xc82048d500
fatal error: fault
[signal 0xa code=0xc addr=0xc82048d500 pc=0xc82048d500]

goroutine 7 [running]:
runtime.throw(0x9e4730, 0x5)
    /usr/local/go/src/runtime/panic.go:547 +0x90 fp=0xc820022580 sp=0xc820022568
runtime.sigpanic()
    /usr/local/go/src/runtime/sigpanic_unix.go:21 +0x1e4 fp=0xc8200225d0 sp=0xc820022580
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e

goroutine 1 [semacquire]:
sync.runtime_Semacquire(0xc8201f3a7c)
    /usr/local/go/src/runtime/sema.go:47 +0x26
sync.(*WaitGroup).Wait(0xc8201f3a70)
    /usr/local/go/src/sync/waitgroup.go:127 +0xb4
main.(*builder).do(0xc82031d0a0, 0xc8203e3110)
    /usr/local/go/src/cmd/go/build.go:1323 +0x3c6
main.runInstall(0xc87c60, 0xc8200701d0, 0x1, 0x1)
    /usr/local/go/src/cmd/go/build.go:634 +0x4e5
main.main()
    /usr/local/go/src/cmd/go/main.go:181 +0x783

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/local/go/src/runtime/asm_amd64.s:1998 +0x1

goroutine 20 [syscall]:
os/signal.signal_recv(0x0)
    /usr/local/go/src/runtime/sigqueue.go:116 +0x132
os/signal.loop()
    /usr/local/go/src/os/signal/signal_unix.go:22 +0x18
created by os/signal.init.1
    /usr/local/go/src/os/signal/signal_unix.go:28 +0x37

goroutine 3 [semacquire]:
sync.runtime_Semacquire(0xcac1ec)
    /usr/local/go/src/runtime/sema.go:47 +0x26
sync.(*RWMutex).RLock(0xcac1e0)
    /usr/local/go/src/sync/rwmutex.go:37 +0x58
os.Pipe(0x9, 0x0, 0x0, 0x0)
    /usr/local/go/src/os/pipe_bsd.go:17 +0x4f
os/exec.(*Cmd).writerDescriptor(0xc820163680, 0x800dbc800, 0xc820198fc0, 0x0, 0x0, 0x0)
    /usr/local/go/src/os/exec/exec.go:228 +0x27a
os/exec.(*Cmd).stdout(0xc820163680, 0x0, 0x0, 0x0)
    /usr/local/go/src/os/exec/exec.go:204 +0x4c
os/exec.(*Cmd).Start(0xc820163680, 0x0, 0x0)
    /usr/local/go/src/os/exec/exec.go:316 +0x2f4
os/exec.(*Cmd).Run(0xc820163680, 0x0, 0x0)
    /usr/local/go/src/os/exec/exec.go:259 +0x2d
main.(*builder).runOut(0xc82031d0a0, 0xc8201c94a0, 0x54, 0xc8202b44c0, 0x3e, 0x0, 0x0, 0x0, 0xc8204211e0, 0x14, ...)
    /usr/local/go/src/cmd/go/build.go:2049 +0x364
main.gcToolchain.gc(0xc82031d0a0, 0xc82039bc00, 0xc82006dc80, 0x57, 0xc82006dbc0, 0x5b, 0x0, 0xc82045a6e0, 0x2, 0x2, ...)
    /usr/local/go/src/cmd/go/build.go:2310 +0x1261
main.(*gcToolchain).gc(0xcac038, 0xc82031d0a0, 0xc82039bc00, 0xc82006dc80, 0x57, 0xc82006dbc0, 0x5b, 0x0, 0xc82045a6e0, 0x2, ...)
    <autogenerated>:3 +0x18e
main.(*builder).build(0xc82031d0a0, 0xc82015bee0, 0x0, 0x0)
    /usr/local/go/src/cmd/go/build.go:1484 +0x224c
main.(*builder).do.func1(0xc82015bee0)
    /usr/local/go/src/cmd/go/build.go:1257 +0x3b2
main.(*builder).do.func2(0xc8201f3a70, 0xc82031d0a0, 0xc82045a560)
    /usr/local/go/src/cmd/go/build.go:1314 +0x156
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e

goroutine 4 [semacquire]:
sync.runtime_Semacquire(0xc82031d0e4)
    /usr/local/go/src/runtime/sema.go:47 +0x26
sync.(*Mutex).Lock(0xc82031d0e0)
    /usr/local/go/src/sync/mutex.go:83 +0x1c4
main.(*builder).do.func2(0xc8201f3a70, 0xc82031d0a0, 0xc82045a560)
    /usr/local/go/src/cmd/go/build.go:1311 +0xfc
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e

goroutine 5 [semacquire]:
sync.runtime_Semacquire(0xc82031d0e4)
    /usr/local/go/src/runtime/sema.go:47 +0x26
sync.(*Mutex).Lock(0xc82031d0e0)
    /usr/local/go/src/sync/mutex.go:83 +0x1c4
main.(*builder).do.func2(0xc8201f3a70, 0xc82031d0a0, 0xc82045a560)
    /usr/local/go/src/cmd/go/build.go:1311 +0xfc
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e

goroutine 6 [select]:
main.(*builder).do.func2(0xc8201f3a70, 0xc82031d0a0, 0xc82045a560)
    /usr/local/go/src/cmd/go/build.go:1304 +0x1cf
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e

goroutine 8 [semacquire]:
runtime.gopark(0x0, 0xc820022f58, 0xc82006c660, 0xc82006c660, 0xc82006c660, 0x4dcfa0)
    /usr/local/go/src/runtime/proc.go:262 +0x163
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e

goroutine 9 [semacquire]:
sync.runtime_Semacquire(0xc82031d0e4)
    /usr/local/go/src/runtime/sema.go:47 +0x26
sync.(*Mutex).Lock(0xc82031d0e0)
    /usr/local/go/src/sync/mutex.go:83 +0x1c4
main.(*builder).do.func2(0xc8201f3a70, 0xc82031d0a0, 0xc82045a560)
    /usr/local/go/src/cmd/go/build.go:1311 +0xfc
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e

goroutine 10 [running]:
    goroutine running on other thread; stack unavailable
created by main.(*builder).do
    /usr/local/go/src/cmd/go/build.go:1320 +0x39e