// 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-generator-function-definitions-runtime-semantics-evaluation es6id: 14.4.14 description: > Abrupt completion returned when accessing `value` property of iteration result info: | YieldExpression : yield * AssignmentExpression 1. Let exprRef be the result of evaluating AssignmentExpression. 2. Let value be ? GetValue(exprRef). 3. Let iterator be ? GetIterator(value). 4. Let received be NormalCompletion(undefined). 5. Repeat a. If received.[[Type]] is normal, then i. Let innerResult be ? IteratorNext(iterator, received.[[Value]]). ii. Let done be ? IteratorComplete(innerResult). iii. If done is true, then 1. Return ? IteratorValue(innerResult). 7.4.4 IteratorValue 1. Assert: Type(iterResult) is Object. 2. Return ? Get(iterResult, "value"). features: [generators, Symbol.iterator] ---*/ var thrown = new Test262Error(); var badIter = {}; var poisonedValue = Object.defineProperty({ done: true }, 'value', { get: function() { throw thrown; } }); badIter[Symbol.iterator] = function() { return { next: function() { return poisonedValue; } }; }; function* g() { try { yield * badIter; } catch (err) { caught = err; } } var iter = g(); var result, caught; result = iter.next(); assert.sameValue(caught, thrown);