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PR-URL: https://github.com/nodejs/node/pull/44741 Fixes: https://github.com/nodejs/node/issues/44650 Fixes: https://github.com/nodejs/node/issues/37472 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
58 lines
1.5 KiB
JavaScript
58 lines
1.5 KiB
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --no-always-turbofan
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Debug = debug.Debug;
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var step = 0;
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var exception = null;
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function listener(event, exec_state, event_data, data) {
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if (event != Debug.DebugEvent.Break) return;
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try {
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if (step == 0) {
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assertEquals("error", exec_state.frame(0).evaluate("e").value());
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exec_state.frame(0).evaluate("write_0('foo')");
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exec_state.frame(0).evaluate("write_1('modified')");
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} else {
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assertEquals("argument", exec_state.frame(0).evaluate("e").value());
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exec_state.frame(0).evaluate("write_2('bar')");
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}
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step++;
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} catch (e) {
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print(e + e.stack);
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exception = e;
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}
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}
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Debug.setListener(listener);
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function f(e, x) {
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try {
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throw "error";
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} catch(e) {
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// In ES2015 hoisting semantics, 'x' binds to the argument
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// and 'e' binds to the exception.
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function write_0(v) { e = v }
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function write_1(v) { x = v }
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// Make sure write_0 and write_1 are 'used' so that they are visible to the
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// debugger.
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write_0, write_1;
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debugger;
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assertEquals("foo", e); // overwritten by the debugger
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}
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assertEquals("argument", e); // debugger did not overwrite
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function write_2(v) { e = v }
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// Make sure write_2 is 'used' so that it is visible to the debugger.
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write_2;
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debugger;
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assertEquals("bar", e);
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assertEquals("modified", x);
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}
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f("argument")
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assertNull(exception);
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assertEquals(2, step);
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