1 files changed, 9 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaExprMember.cpp b/clang/lib/Sema/SemaExprMember.cpp
index eddf0d69a22..806a3d813ee 100644
--- a/clang/lib/Sema/SemaExprMember.cpp
+++ b/clang/lib/Sema/SemaExprMember.cpp
@@ -969,6 +969,15 @@ Sema::BuildMemberReferenceExpr(Expr *BaseExpr, QualType BaseExprType,
     BaseType = BaseType->castAs<PointerType>()->getPointeeType();
   }
   R.setBaseObjectType(BaseType);
+
+  // C++1z [expr.ref]p2:
+  //   For the first option (dot) the first expression shall be a glvalue [...]
+  if (!IsArrow && BaseExpr->isRValue()) {
+    ExprResult Converted = TemporaryMaterializationConversion(BaseExpr);
+    if (Converted.isInvalid())
+      return ExprError();
+    BaseExpr = Converted.get();
+  }
   
   LambdaScopeInfo *const CurLSI = getCurLambda();
   // If this is an implicit member reference and the overloaded