Repository: go
Issue: runtime: stack grow panic tracing back through sigpanic from signal handler
Labels: NeedsInvestigation

From https://build.golang.org/log/6864350004c318139a5516a5b65d5099a88a0272:

````
panic: runtime: unexpected return pc for runtime.exitsyscall called from 0x0
fatal error: unknown caller pc
panic during panic
runtime stack:
runtime.startpanic_m()
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/panic.go:688 +0x174
runtime.startpanic()
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/panic.go:589 +0x14
runtime.throw(0x100f5e61e, 0x11)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/panic.go:615 +0x54
runtime.gentraceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0x106ade300, 0x0, 0x0, 0x7fffffff, 0x100f65ab0, 0x16f0177e0, 0x0, ...)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/traceback.go:286 +0x14fc
runtime.copystack(0x106ade300, 0x1000, 0x1)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/stack.go:891 +0x1c4
runtime.newstack()
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/stack.go:1063 +0x254
runtime.morestack()
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/asm_arm64.s:297 +0x68

goroutine 40 [copystack]:
runtime.mapaccess1_fast32(0x100f31600, 0x0, 0x15dc0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/hashmap_fast.go:12 +0x1b8 fp=0x106b05b60 sp=0x106b05b60 pc=0x100df6818
runtime.resolveTypeOff(0x100f34880, 0x15dc0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/type.go:227 +0x70 fp=0x106b05bc0 sp=0x106b05b60 pc=0x100e38a70
runtime.(*_type).typeOff(0x100f34880, 0x100015dc0, 0x101039901)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/type.go:239 +0x28 fp=0x106b05be0 sp=0x106b05bc0 pc=0x100e38cf8
runtime.(*itab).init(0x10126cff0, 0x0, 0x101057ee0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/iface.go:193 +0x228 fp=0x106b05c90 sp=0x106b05be0 pc=0x100df9ec8
runtime.getitab(0x100f34880, 0x100f26c00, 0x1, 0x1)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/iface.go:69 +0x3b0 fp=0x106b05d10 sp=0x106b05c90 pc=0x100df99a0
runtime.assertE2I2(0x100f34880, 0x100f26c00, 0x106b21fe0, 0x106a20058, 0x106a10798, 0x100e16068)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/iface.go:592 +0x34 fp=0x106b05d40 sp=0x106b05d10 pc=0x100dfad04
runtime.printany(0x100f26c00, 0x106b21fe0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/error.go:78 +0x48 fp=0x106b05e40 sp=0x106b05d40 pc=0x100df2a98
runtime.printpanics(0x106b05ed8)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/panic.go:417 +0x58 fp=0x106b05e60 sp=0x106b05e40 pc=0x100e15108
panic(0x100f32260, 0x1010320c0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/panic.go:550 +0x398 fp=0x106b05f00 sp=0x106b05e60 pc=0x100e15528
runtime.panicmem()
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/panic.go:63 +0x5c fp=0x106b05f20 sp=0x106b05f00 pc=0x100e1425c
runtime.sigpanic()
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/signal_unix.go:382 +0x134 fp=0x106b05f70 sp=0x106b05f20 pc=0x100e2a0f4
runtime.exitsyscall(0x3b)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/proc.go:2973 +0x48 fp=0x106b05fb0 sp=0x106b05f80 pc=0x100e1dd68
created by log/syslog.TestConcurrentReconnect
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:351 +0x1d0

goroutine 1 [chan receive]:
testing.(*T).Run(0x106abc000, 0x100f5faef, 0x17, 0x100f65808, 0x5a5ae101)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:825 +0x258
testing.runTests.func1(0x106abc000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:1063 +0x54
testing.tRunner(0x106abc000, 0x106a5ddd0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:777 +0xb0
testing.runTests(0x106a88180, 0x101036660, 0x8, 0x8, 0x100e3ab60)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:1061 +0x26c
testing.(*M).Run(0x106aba000, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:978 +0x14c
main.main()
	_testmain.go:58 +0x15c

goroutine 20 [chan receive]:
testing.(*T).Parallel(0x106abc0f0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:697 +0x17c
log/syslog.TestWithSimulated(0x106abc0f0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:137 +0x28
testing.tRunner(0x106abc0f0, 0x100f65840)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:777 +0xb0
created by testing.(*T).Run
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:824 +0x244

goroutine 8 [chan receive]:
testing.(*T).Parallel(0x106ac03c0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:697 +0x17c
log/syslog.TestWrite(0x106ac03c0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:266 +0x48
testing.tRunner(0x106ac03c0, 0x100f65848)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:777 +0xb0
created by testing.(*T).Run
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:824 +0x244

goroutine 38 [semacquire]:
sync.runtime_Semacquire(0x106a182cc)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/sema.go:56 +0x2c
sync.(*WaitGroup).Wait(0x106a182c0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/sync/waitgroup.go:129 +0x68
log/syslog.TestConcurrentReconnect(0x106ac05a0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:385 +0x260
testing.tRunner(0x106ac05a0, 0x100f65808)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:777 +0xb0
created by testing.(*T).Run
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/testing/testing.go:824 +0x244

goroutine 53 [runnable]:
log/syslog.runStreamSyslog.func1(0x106a18280, 0x106a621e0, 0x100f7be40, 0x106a0e090)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74
created by log/syslog.runStreamSyslog
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74 +0x6c

goroutine 46 [runnable]:
syscall.Syscall(0x4, 0x9, 0x106ab64c0, 0x3b, 0x3b, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/syscall/asm_darwin_arm64.s:13 +0x8
syscall.write(0x9, 0x106ab64c0, 0x3b, 0x40, 0x100e54400, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/syscall/zsyscall_darwin_arm64.go:1321 +0x48
syscall.Write(0x9, 0x106ab64c0, 0x3b, 0x40, 0x7ffffffe7534aa79, 0x0, 0x1)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/syscall/syscall_unix.go:181 +0x38
internal/poll.(*FD).Write(0x106ad0500, 0x106ab64c0, 0x3b, 0x40, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_unix.go:256 +0x104
net.(*netFD).Write(0x106ad0500, 0x106ab64c0, 0x3b, 0x40, 0x100f52bc0, 0x100e80e78, 0x101032210)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/fd_unix.go:220 +0x3c
net.(*conn).Write(0x106a92070, 0x106ab64c0, 0x3b, 0x40, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/net.go:188 +0x50
fmt.Fprintf(0x100f7a1a0, 0x106a92070, 0x100f5f69a, 0x16, 0x106afbda0, 0x7, 0x7, 0x3b, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/fmt/print.go:189 +0x7c
log/syslog.(*netConn).writeString(0x106a882c0, 0xe, 0x106ac8360, 0x12, 0x100f5bb9b, 0x3, 0x100f5bd25, 0x4, 0x100f5ba0f, 0x1, ...)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog.go:295 +0x424
log/syslog.(*Writer).write(0x106a62300, 0xe, 0x100f5bd25, 0x4, 0x4, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog.go:273 +0xa8
log/syslog.(*Writer).writeAndRetry(0x106a62300, 0x6, 0x100f5bd25, 0x4, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog.go:254 +0x124
log/syslog.(*Writer).Info(0x106a62300, 0x100f5bd25, 0x4, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog.go:236 +0x38
log/syslog.TestConcurrentReconnect.func3(0x106a182c0, 0x106a1e440, 0x106a182b0, 0xf, 0x106ac05a0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:377 +0x15c
created by log/syslog.TestConcurrentReconnect
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:368 +0x244

goroutine 47 [IO wait]:
internal/poll.runtime_pollWait(0x10126ca90, 0x77, 0x10126ca98)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x106aba898, 0x77, 0x106afc600, 0x106afc658, 0x106ab9901)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitWrite(0x106aba898, 0x106aba800, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:94 +0x30
internal/poll.(*FD).WaitWrite(0x106aba880, 0x106a86048, 0x106a86048)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_unix.go:440 +0x2c
net.(*netFD).connect(0x106aba880, 0x100f7b380, 0x106a86048, 0x0, 0x0, 0x100f7a360, 0x106ab9960, 0x0, 0x0, 0x0, ...)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/fd_unix.go:152 +0x1ec
net.(*netFD).dial(0x106aba880, 0x100f7b380, 0x106a86048, 0x100f7b9c0, 0x0, 0x100f7b9c0, 0x106a80ba0, 0x100ef2298, 0x106a86da0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/sock_posix.go:142 +0x98
net.socket(0x100f7b380, 0x106a86048, 0x100f5bb9e, 0x3, 0x2, 0x1, 0x0, 0x0, 0x100f7b9c0, 0x0, ...)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/sock_posix.go:93 +0x128
net.internetSocket(0x100f7b380, 0x106a86048, 0x100f5bb9e, 0x3, 0x100f7b9c0, 0x0, 0x100f7b9c0, 0x106a80ba0, 0x1, 0x0, ...)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/ipsock_posix.go:141 +0xbc
net.doDialTCP(0x100f7b380, 0x106a86048, 0x100f5bb9e, 0x3, 0x0, 0x106a80ba0, 0x101039120, 0x100f7b380, 0x106a86048)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/tcpsock_posix.go:62 +0x78
net.dialTCP(0x100f7b380, 0x106a86048, 0x100f5bb9e, 0x3, 0x0, 0x106a80ba0, 0x0, 0x100e51b68, 0x150993ee4291fdb0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/tcpsock_posix.go:58 +0xb0
net.dialSingle(0x100f7b380, 0x106a86048, 0x106aba800, 0x100f7ab00, 0x106a80ba0, 0x0, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/dial.go:547 +0x300
net.dialSerial(0x100f7b380, 0x106a86048, 0x106aba800, 0x106b179c0, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/dial.go:515 +0x18c
net.(*Dialer).DialContext(0x106afcda8, 0x100f7b380, 0x106a86048, 0x100f5bb9e, 0x3, 0x106a182b0, 0xf, 0x0, 0x0, 0x0, ...)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/dial.go:397 +0x510
net.(*Dialer).Dial(0x106afcda8, 0x100f5bb9e, 0x3, 0x106a182b0, 0xf, 0x0, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/dial.go:320 +0x5c
net.Dial(0x100f5bb9e, 0x3, 0x106a182b0, 0xf, 0x106ac83c0, 0x12, 0x100f5bb9b, 0x3)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/dial.go:291 +0x58
log/syslog.(*Writer).connect(0x106a62360, 0xe, 0x100f5bd25)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog.go:162 +0x10c
log/syslog.(*Writer).writeAndRetry(0x106a62360, 0x6, 0x100f5bd25, 0x4, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog.go:258 +0x90
log/syslog.(*Writer).Info(0x106a62360, 0x100f5bd25, 0x4, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog.go:236 +0x38
log/syslog.TestConcurrentReconnect.func3(0x106a182c0, 0x106a1e440, 0x106a182b0, 0xf, 0x106ac05a0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:377 +0x15c
created by log/syslog.TestConcurrentReconnect
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:368 +0x244

goroutine 39 [IO wait]:
internal/poll.runtime_pollWait(0x10126cea0, 0x72, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x106ad0218, 0x72, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x106ad0218, 0xffffffffffffff00, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Accept(0x106ad0200, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_unix.go:372 +0x164
net.(*netFD).accept(0x106ad0200, 0x106a0e098, 0x0, 0x100e1e45c)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/fd_unix.go:238 +0x24
net.(*TCPListener).accept(0x106a0e038, 0x106a0e098, 0x100e3cc20, 0x106ae5f40)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/tcpsock_posix.go:136 +0x24
net.(*TCPListener).Accept(0x106a0e038, 0x100f65850, 0x106a18280, 0x106a621e0, 0x100f7be40)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/tcpsock.go:259 +0x34
log/syslog.runStreamSyslog(0x100f7b000, 0x106a0e038, 0x106a621e0, 0x106a18280)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:70 +0x80
log/syslog.startServer.func2(0x106a0e030, 0x100f7b000, 0x106a0e038, 0x106a621e0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:130 +0x68
created by log/syslog.startServer
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:128 +0x378

goroutine 51 [runnable]:
log/syslog.runStreamSyslog.func1(0x106a18280, 0x106a621e0, 0x100f7be40, 0x106a0e080)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74
created by log/syslog.runStreamSyslog
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74 +0x6c

goroutine 24 [IO wait]:
internal/poll.runtime_pollWait(0x10126c680, 0x72, 0x106b09000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x106aba318, 0x72, 0xffffffffffffff00, 0x100f7a5c0, 0x101020f80)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x106aba318, 0x106b09000, 0x1000, 0x1000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x106aba300, 0x106b09000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_unix.go:157 +0x198
net.(*netFD).Read(0x106aba300, 0x106b09000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/fd_unix.go:202 +0x3c
net.(*conn).Read(0x106a92040, 0x106b09000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/net.go:176 +0x50
bufio.(*Reader).fill(0x106afef58)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:100 +0x104
bufio.(*Reader).ReadSlice(0x106afef58, 0x100e5310a, 0x18, 0x106a2fdb8, 0x106a70d80, 0x100e53b78, 0x106aba300)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:341 +0x20
bufio.(*Reader).ReadBytes(0x106afef58, 0xbe8ed63f84bab50a, 0x12aed3521, 0x100f0de00, 0x1000, 0x100f26dc0, 0x106a2fe01)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:419 +0x48
bufio.(*Reader).ReadString(0x106a2ff58, 0x100a, 0x1000, 0x106b09000, 0x1000, 0x1000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:459 +0x28
log/syslog.runStreamSyslog.func1(0x106a18280, 0x106a621e0, 0x100f7be40, 0x106a92040)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:79 +0x154
created by log/syslog.runStreamSyslog
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74 +0x6c

goroutine 52 [runnable]:
log/syslog.runStreamSyslog.func1(0x106a18280, 0x106a621e0, 0x100f7be40, 0x106a0e088)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74
created by log/syslog.runStreamSyslog
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74 +0x6c

goroutine 26 [runnable]:
internal/poll.runtime_pollWait(0x10126c340, 0x72, 0x106b0b000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x106aba418, 0x72, 0xffffffffffffff00, 0x100f7a5c0, 0x101020f80)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x106aba418, 0x106b0b000, 0x1000, 0x1000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x106aba400, 0x106b0b000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_unix.go:157 +0x198
net.(*netFD).Read(0x106aba400, 0x106b0b000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/fd_unix.go:202 +0x3c
net.(*conn).Read(0x106a92050, 0x106b0b000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/net.go:176 +0x50
bufio.(*Reader).fill(0x106b00f58)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:100 +0x104
bufio.(*Reader).ReadSlice(0x106b00f58, 0x100e5310a, 0x18, 0x106a30db8, 0x106a71080, 0x100e53b78, 0x106aba400)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:341 +0x20
bufio.(*Reader).ReadBytes(0x106b00f58, 0xbe8ed63f84bb740a, 0x12aedf0a1, 0x100f0de00, 0x1000, 0x100f26dc0, 0x106a30e01)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:419 +0x48
bufio.(*Reader).ReadString(0x106a30f58, 0x100a, 0x1000, 0x106b0b000, 0x1000, 0x1000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:459 +0x28
log/syslog.runStreamSyslog.func1(0x106a18280, 0x106a621e0, 0x100f7be40, 0x106a92050)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:79 +0x154
created by log/syslog.runStreamSyslog
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74 +0x6c

goroutine 27 [runnable]:
internal/poll.runtime_pollWait(0x10126c270, 0x72, 0x106ad5000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x106aba498, 0x72, 0xffffffffffffff00, 0x100f7a5c0, 0x101020f80)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x106aba498, 0x106ad5000, 0x1000, 0x1000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x106aba480, 0x106ad5000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/internal/poll/fd_unix.go:157 +0x198
net.(*netFD).Read(0x106aba480, 0x106ad5000, 0x1000, 0x1000, 0x2503, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/fd_unix.go:202 +0x3c
net.(*conn).Read(0x106a92058, 0x106ad5000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/net/net.go:176 +0x50
bufio.(*Reader).fill(0x106a42f58)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:100 +0x104
bufio.(*Reader).ReadSlice(0x106a42f58, 0xa, 0x0, 0x5, 0x2, 0x4, 0x1)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:341 +0x20
bufio.(*Reader).ReadBytes(0x106a42f58, 0xbe8ed63f84abc50a, 0x12ade44e9, 0x100f0de00, 0x1000, 0x100f26dc0, 0x106a31601)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:419 +0x48
bufio.(*Reader).ReadString(0x106a31758, 0x100a, 0x1000, 0x106ad5000, 0x1000, 0x1000)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/bufio/bufio.go:459 +0x28
log/syslog.runStreamSyslog.func1(0x106a18280, 0x106a621e0, 0x100f7be40, 0x106a92058)
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:79 +0x154
created by log/syslog.runStreamSyslog
	/private/var/folders/f6/d2bhfqss2716nxm8gkv1fmb80000gn/T/workdir-host-darwin-amd64-eliasnaur-ios/go/src/log/syslog/syslog_test.go:74 +0x6c

````

The stack looks interesting to me. @aclements ?