lib/Frontend/TextDiagnostic.cpp

447       unsigned NewEnd = map.startOfNextColumn(SourceEnd);
452       while (NewEnd < SourceLine.size() && isWhitespace(SourceLine[NewEnd]))
453         NewEnd = map.startOfNextColumn(NewEnd);
456       while (NewEnd < SourceLine.size() && isWhitespace(SourceLine[NewEnd]))
457         NewEnd = map.startOfNextColumn(NewEnd);
459       assert(map.byteToColumn(NewEnd) != -1);
460       unsigned NewColumns = map.byteToColumn(NewEnd) -
463         SourceEnd = NewEnd;