// When the diagnostic string is only "%0", the entire string is being given
// by an outside source. Remove unprintable characters from this string
// and skip all the other string processing.
- if (DiagEnd - DiagStr == 2 && DiagStr[0] == '%' && DiagStr[1] == '0' &&
+ if (DiagEnd - DiagStr == 2 &&
+ StringRef(DiagStr, DiagEnd - DiagStr).equals("%0") &&
getArgKind(0) == DiagnosticsEngine::ak_std_string) {
const std::string &S = getArgStdStr(0);
for (char c : S) {