Init LookupResult::AmbiguityKind

We don't expect useful value there unless it's "ambiguous".
However we use read it for copying and moving, so we need either init the field
add login to avoid reading invalid values. Such reads trigger ubsan errors.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@343150 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Sema/Lookup.h b/include/clang/Sema/Lookup.h
index faf2343d39cf8cf920e198a8783db9e9dcc90ee3..ef2842195ff67c974d23db5151be7dfd1f296726 100644 (file)
--- a/include/clang/Sema/Lookup.h
+++ b/include/clang/Sema/Lookup.h
@@ -709,7 +709,9 @@ private:
 
   // Results.
   LookupResultKind ResultKind = NotFound;
-  AmbiguityKind Ambiguity; // ill-defined unless ambiguous
+  // ill-defined unless ambiguous. Still need to be initialized it will be
+  // copied/moved.
+  AmbiguityKind Ambiguity = {}; 
   UnresolvedSet<8> Decls;
   CXXBasePaths *Paths = nullptr;
   CXXRecordDecl *NamingClass = nullptr;