golang v1.3 panic runtime park signal loop on darwin/amd64 mac osx

gistfile1.txt

panic: Show me the stacks

goroutine 16 [running]:
runtime.panic(0x29fb00, 0xc208001f10)
	/Users/abhinavsingh/Dev/go/src/pkg/runtime/panic.c:279 +0xf5
main.main()
	/Users/abhinavsingh/Dev/....:31 +0x280

goroutine 19 [finalizer wait]:
runtime.park(0x14840, 0x3f0da0, 0x3ef8a9)
	/Users/abhinavsingh/Dev/go/src/pkg/runtime/proc.c:1369 +0x89
runtime.parkunlock(0x3f0da0, 0x3ef8a9)
	/Users/abhinavsingh/Dev/go/src/pkg/runtime/proc.c:1385 +0x3b
runfinq()
	/Users/abhinavsingh/Dev/go/src/pkg/runtime/mgc0.c:2644 +0xcf
runtime.goexit()
	/Users/abhinavsingh/Dev/go/src/pkg/runtime/proc.c:1445

goroutine 20 [syscall]:
os/signal.loop()
	/Users/abhinavsingh/Dev/go/src/pkg/os/signal/signal_unix.go:21 +0x1e
created by os/signal.init·1
	/Users/abhinavsingh/Dev/go/src/pkg/os/signal/signal_unix.go:27 +0x32
exit status 2