diff --git a/clang/lib/AST/Interp/InterpState.h b/clang/lib/AST/Interp/InterpState.h
--- a/clang/lib/AST/Interp/InterpState.h
+++ b/clang/lib/AST/Interp/InterpState.h
@@ -39,6 +39,9 @@
 
   ~InterpState();
 
+  InterpState(const InterpState &) = delete;
+  InterpState &operator=(const InterpState &) = delete;
+
   // Stack frame accessors.
   Frame *getSplitFrame() { return Parent.getCurrentFrame(); }
   Frame *getCurrentFrame() override;