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deps/v8/test/debugger/debug/debug-evaluate-local-repl-hole.js

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+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Test that *local* debug-evaluate properly works for REPL 'let'
+// re-declarations.
+
+Debug = debug.Debug
+
+let exception = null;
+function listener(event, exec_state, event_data, data) {
+  if (event != Debug.DebugEvent.Break) return;
+  try {
+    assertEquals(42, exec_state.frame(0).evaluate("x").value());
+  } catch (e) {
+    exception = e;
+    print(e + e.stack);
+  }
+}
+
+Debug.setListener(listener);
+
+// First script introduces a let-binding 'x'. The value of
+// 'x' lives in the ScriptContext of this REPL script.
+Debug.evaluateGlobalREPL('let x = 21;');
+
+// The second script re-declares 'x', but then breaks and
+// evaluates x.
+Debug.evaluateGlobalREPL(`
+  let x = 42;
+  (function foo() {
+    debugger;
+  })();
+`);
+
+Debug.setListener(null);
+assertNull(exception);