//golangcitest:args -Enosprintfhostport package testdata /* #include #include void myprint(char* s) { printf("%d\n", s); } */ import "C" import ( "fmt" "unsafe" ) func _() { cs := C.CString("Hello from stdio\n") C.myprint(cs) C.free(unsafe.Pointer(cs)) } func _() { ip := "fd00::1" _ = fmt.Sprintf("http://%s:1936/healthz", ip) // want "host:port in url should be constructed with net.JoinHostPort and not directly with fmt.Sprintf" }