From 8d69b5a1137debfe11e9073c4edb99d477387072 Mon Sep 17 00:00:00 2001 From: Daniel Berlin Date: Thu, 4 Oct 2007 05:29:36 +0000 Subject: [PATCH] It helps a lot when you check for the end of your list before randomly dereferencing things. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42605 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/ADT/SparseBitVector.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/llvm/ADT/SparseBitVector.h b/include/llvm/ADT/SparseBitVector.h index d1e91250680..b02eb3e4805 100644 --- a/include/llvm/ADT/SparseBitVector.h +++ b/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);