From ffffead7dfd48f045b86408199f9811f5bdcfef0 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. llvm-svn: 42605 --- llvm/include/llvm/ADT/SparseBitVector.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/llvm/include/llvm/ADT/SparseBitVector.h b/llvm/include/llvm/ADT/SparseBitVector.h index d1e91250680d..b02eb3e48059 100644 --- 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);