diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -2482,7 +2482,7 @@
             << /*Call*/ 1 << /*Function*/ 0 << E->getSourceRange();
       }
       for (auto A : E->arguments()) {
-        getDerived().TraverseStmt(A);
+        (void)getDerived().TraverseStmt(A);
       }
       return true;
     }
@@ -2516,7 +2516,7 @@
     bool VisitBlockExpr(BlockExpr *T) { return true; }
 
   } Visitor(*this, FD);
-  Visitor.TraverseStmt(FD->getBody());
+  (void)Visitor.TraverseStmt(FD->getBody());
 }
 
 /// Get the class that is directly named by the current context. This is the