Strict mode Failing
Expected no error, got TypeError: Cannot read property 'length' of undefined
non-Strict mode Failing
Expected no error, got TypeError: Cannot read property 'length' of undefined
Features:
- Symbol.species
Expected no error, got TypeError: Cannot read property 'length' of undefined
Expected no error, got TypeError: Cannot read property 'length' of undefined
// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-array.prototype.slice description: The value `-0` is converted to `0` info: | [...] 3. Let relativeStart be ? ToInteger(start). 4. If relativeStart < 0, let k be max((len + relativeStart), 0); else let k be min(relativeStart, len). 5. If end is undefined, let relativeEnd be len; else let relativeEnd be ? ToInteger(end). 6. If relativeEnd < 0, let final be max((len + relativeEnd), 0); else let final be min(relativeEnd, len). 7. Let count be max(final - k, 0). 8. Let A be ? ArraySpeciesCreate(O, count). [...] 9.4.2.3 ArraySpeciesCreate [...] 2. If length is -0, let length be +0. [...] 5. Let C be ? Get(originalArray, "constructor"). [...] 7. If Type(C) is Object, then a. Let C be ? Get(C, @@species). b. If C is null, let C be undefined. [...] 10. Return ? Construct(C, « length »). features: [Symbol.species] ---*/ var args; var Ctor = function() { args = arguments; }; var a = []; a.constructor = {}; a.constructor[Symbol.species] = Ctor; a.slice(0, -0); assert.sameValue(args.length, 1); assert.sameValue(args[0], 0);