don't dereference hte end iterator when inserting at end of buffer.

Patch by Cédric Venet!

llvm-svn: 49259

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/include/clang/Rewrite/RewriteRope.h b/clang/include/clang/Rewrite/RewriteRope.h
index 4d558b579f3..8d2fbe38575 100644
--- a/clang/include/clang/Rewrite/RewriteRope.h
+++ b/clang/include/clang/Rewrite/RewriteRope.h
@@ -148,6 +148,7 @@ public:
   
   iterator getAtOffset(unsigned Offset) {
     assert(Offset <= CurSize && "Offset out of range!");
+    if (Offset == CurSize) return iterator(Chunks.end(), 0);
     std::list<RopePiece>::iterator Piece = Chunks.begin();
     while (Offset >= Piece->size()) {
       Offset -= Piece->size();
@@ -158,6 +159,7 @@ public:
 
   const_iterator getAtOffset(unsigned Offset) const {
     assert(Offset <= CurSize && "Offset out of range!");
+    if (Offset == CurSize) return const_iterator(Chunks.end(), 0);
     std::list<RopePiece>::const_iterator Piece = Chunks.begin();
     while (Offset >= Piece->size()) {
       Offset -= Piece->size();