1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index dc7fe1d92b..5ece958ee6 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -6422,6 +6422,10 @@ static void CheckMoveOnConstruction(Sema &S, const Expr *InitExpr,
     if (!VD || !VD->hasLocalStorage())
       return;
 
+    // __block variables are not moved implicitly.
+    if (VD->hasAttr<BlocksAttr>())
+      return;
+
     QualType SourceType = VD->getType();
     if (!SourceType->isRecordType())
       return;