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);