This is a followup to https://golang.org/cl/176080043/. That change didn't handle the case of a *Config being nil. CC=golang-codereviews https://golang.org/cl/179200043
This is a followup to https://golang.org/cl/176080043/. That change didn't handle the case of a *Config being nil. CC=golang-codereviews https://golang.org/cl/179200043