gh-134869: Fix Ctrl+C corrupts REPL autocomplete

Lib/_pyrepl/simple_interact.py

@@ -158,6 +158,10 @@ def maybe_run_command(statement: str) -> bool:
             input_n += 1
         except KeyboardInterrupt:
             r = _get_reader()
+            r.cmpltn_menu_visible = False
+            r.cmpltn_message_visible = False
+            r.cmpltn_menu = []
+            r.cmpltn_menu_end = 0
             if r.input_trans is r.isearch_trans:
                 r.do_cmd(("isearch-end", [""]))
             r.pos = len(r.get_unicode())