1 files changed, 3 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index f2e50ba77b4..9b5f003dae9 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -3380,6 +3380,9 @@ ExprResult Sema::BuildCXXDefaultArgExpr(SourceLocation CallLoc,
   if (Param->hasUninstantiatedDefaultArg()) {
     Expr *UninstExpr = Param->getUninstantiatedDefaultArg();
 
+    EnterExpressionEvaluationContext EvalContext(*this, PotentiallyEvaluated,
+                                                 Param);
+
     // Instantiate the expression.
     MultiLevelTemplateArgumentList ArgList
       = getTemplateInstantiationArgs(FD, 0, /*RelativeToPrimary=*/true);