var google.golang.org/protobuf/internal/encoding/json.errRegexp

2 uses

	google.golang.org/protobuf/internal/encoding/json (current package)
		decode.go#L155: var errRegexp = regexp.MustCompile(`^([-+._a-zA-Z0-9]{1,32}|.)`)
		decode.go#L212: 	return Token{}, d.newSyntaxError(d.currPos(), "invalid value %s", errRegexp.Find(in))