goroutine 1 [running]:
main.main()
	/example/main.go:152 +0x3d2

goroutine 2 [running]:
main.main)(
	/example/main.go:152 +0x3d2

goroutine 3 [running]:
main.foo()
	/example/main.go:182 +0x123
created by main.main
	/example/main.go:110 +0x456