fix crash when printing diagnostics with tokens that span through more than one line

llvm-svn: 54365

clang/Driver/TextDiagnosticPrinter.cpp

@@ -91,13 +91,16 @@ void TextDiagnosticPrinter::HighlightRange(const SourceRange &R,
   }
   
   // Pick the last non-whitespace column.
+  if (EndColNo <= SourceLine.size())
     while (EndColNo-1 &&
            (SourceLine[EndColNo-1] == ' ' || SourceLine[EndColNo-1] == '\t'))
       --EndColNo;
+  else
+    EndColNo = SourceLine.size();
   
   // Fill the range with ~'s.
   assert(StartColNo <= EndColNo && "Invalid range!");
-  for (unsigned i = StartColNo; i != EndColNo; ++i)
+  for (unsigned i = StartColNo; i < EndColNo; ++i)
     CaratLine[i] = '~';
 }
 

clang/test/Sema/text-diag.c

@@ -0,0 +1,4 @@
+// RUN: clang -fsyntax-only %s
+unsigned char *foo = "texto\
+que continua\
+e continua";