Don't crash if someone tries to visit an empty type stream.

llvm-svn: 303408

diff --git a/llvm/lib/DebugInfo/CodeView/CVTypeVisitor.cpp b/llvm/lib/DebugInfo/CodeView/CVTypeVisitor.cpp
index 035b2c0..e8d967b 100644 (file)
--- a/llvm/lib/DebugInfo/CodeView/CVTypeVisitor.cpp
+++ b/llvm/lib/DebugInfo/CodeView/CVTypeVisitor.cpp
@@ -227,6 +227,9 @@ Error CVTypeVisitor::visitTypeStream(CVTypeRange Types) {
 }
 
 Error CVTypeVisitor::visitTypeStream(TypeCollection &Types) {
+  if (Types.empty())
+    return Error::success();
+
   Optional<TypeIndex> I = Types.getFirst();
   do {
     CVType Type = Types.getType(*I);