don't step into the middle of multibyte sequences
llvm-svn: 167361
diff --git a/clang/lib/Frontend/TextDiagnostic.cpp b/clang/lib/Frontend/TextDiagnostic.cpp
index 0eb3d60..ca55197 100644
--- a/clang/lib/Frontend/TextDiagnostic.cpp
+++ b/clang/lib/Frontend/TextDiagnostic.cpp
@@ -418,7 +418,7 @@
bool ExpandedRegion = false;
if (SourceStart>0) {
- unsigned NewStart = SourceStart-1;
+ unsigned NewStart = map.startOfPreviousColumn(SourceStart);
// Skip over any whitespace we see here; we're looking for
// another bit of interesting text.
@@ -445,7 +445,7 @@
}
if (SourceEnd<SourceLine.size()) {
- unsigned NewEnd = SourceEnd+1;
+ unsigned NewEnd = map.startOfNextColumn(SourceEnd);
// Skip over any whitespace we see here; we're looking for
// another bit of interesting text.