It helps a lot when you check for the end of your list before randomly

dereferencing things. llvm-svn: 42605
2007-10-04 05:29:36 +00:00 · 2007-10-04 05:29:36 +00:00 · ffffead7df
parent 2738730c0f
commit ffffead7df
1 changed files with 2 additions and 1 deletions
--- a/llvm/include/llvm/ADT/SparseBitVector.h
+++ b/llvm/include/llvm/ADT/SparseBitVector.h
@ -538,7 +538,8 @@ public:
        // We may have hit the beginning of our SparseBitVector, in which case,
        // we may need to insert right after this element, which requires moving
        // the current iterator forward one, because insert does insert before.
-        if (ElementIter->index() < ElementIndex)
+        if (ElementIter != Elements.end() &&
+            ElementIter->index() < ElementIndex)
          ElementIter = Elements.insert(++ElementIter, Element);
        else
          ElementIter = Elements.insert(ElementIter, Element);