// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-assignment-for-await/array-elem-trlg-iter-list-thrw-close-skip.case // - src/dstr-assignment-for-await/async-generator/async-gen-decl.template /*--- description: IteratorClose is not invoked when evaluation of AssignmentElementList returns an abrupt completion and the iterator has been marked as "done" (for-await-of statement in an async generator declaration) esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation features: [Symbol.iterator, destructuring-binding, async-iteration] flags: [generated, async] info: | IterationStatement : for await ( LeftHandSideExpression of AssignmentExpression ) Statement 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », AssignmentExpression, iterate). 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, keyResult, assignment, labelSet). 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation [...] 5. If destructuring is true and if lhsKind is assignment, then a. Assert: lhs is a LeftHandSideExpression. b. Let assignmentPattern be the parse of the source text corresponding to lhs using AssignmentPattern as the goal symbol. [...] ArrayAssignmentPattern : [ AssignmentElementList , Elisionopt AssignmentRestElementopt ] [...] 3. Let iteratorRecord be Record {[[iterator]]: iterator, [[done]]: false}. 4. Let status be the result of performing IteratorDestructuringAssignmentEvaluation of AssignmentElementList using iteratorRecord as the argument. 5. If status is an abrupt completion, then a. If iteratorRecord.[[done]] is false, return IteratorClose(iterator, status). b. Return Completion(status). ---*/ let nextCount = 0; let returnCount = 0; let iterable = {}; let thrower = function() { throw new Test262Error(); }; let iterator = { next() { nextCount += 1; throw new Test262Error(); }, return() { returnCount += 1; } }; iterable[Symbol.iterator] = function() { return iterator; }; let x; let iterCount = 0; async function * fn() { for await ([ x , ] of [iterable]) { iterCount += 1; } } let iter = fn(); iter.next().then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => { assert.sameValue(nextCount, 1); assert.sameValue(returnCount, 0); assert.sameValue(iterCount, 0); assert.sameValue(constructor, Test262Error); }).then($DONE, $DONE);