Teach ASTVector::append() about the case where 'NumInputs' is 0. This hopefully fixes

a crash in InitListExpr's ctor.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101328 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/include/clang/AST/ASTVector.h b/include/clang/AST/ASTVector.h
index a23ce87a91..217dfade52 100644
--- a/include/clang/AST/ASTVector.h
+++ b/include/clang/AST/ASTVector.h
@@ -176,6 +176,10 @@ public:
   template<typename in_iter>
   void append(ASTContext &C, in_iter in_start, in_iter in_end) {
     size_type NumInputs = std::distance(in_start, in_end);
+
+    if (NumInputs == 0)
+      return;
+
     // Grow allocated space if needed.
     if (NumInputs > size_type(this->capacity_ptr()-this->end()))
       this->grow(C, this->size()+NumInputs);