v8/test/mjsunit/regress/regress-5178.js

// Copyright 2016 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.

assertThrows(() => {
  try { throw {} } catch({a=b, b}) { a+b }
}, ReferenceError);

try { throw {a: 42} } catch({a, b=a}) { assertEquals(42, b) };
[parser] Fix bug in destructuring binding for catch. For variables introduced as part of a catch pattern, we used to set their "initializer position" to the beginning of the pattern. This lead to full-codegen eliminating crucial hole checks when reading such variables inside the pattern itself. R=adamk@chromium.org, littledan@chromium.org BUG=v8:5178 Review-Url: https://codereview.chromium.org/2123953002 Cr-Commit-Position: refs/heads/master@{#37569} 2016-07-07 07:29:28 +00:00			`// Copyright 2016 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.`

			`assertThrows(() => {`
			`try { throw {} } catch({a=b, b}) { a+b }`
			`}, ReferenceError);`
[test] Extend a test of destructuring. R=adamk@chromium.org BUG= Review-Url: https://codereview.chromium.org/2147733003 Cr-Commit-Position: refs/heads/master@{#37773} 2016-07-14 16:11:19 +00:00
			`try { throw {a: 42} } catch({a, b=a}) { assertEquals(42, b) };`