mirror of https://github.com/tc39/test262.git
83 lines
2.5 KiB
JavaScript
83 lines
2.5 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding-for-await/ary-ptrn-elem-id-iter-val-err.case
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// - src/dstr-binding-for-await/error/for-await-of-async-gen-const.template
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/*---
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description: Error forwarding when IteratorValue returns an abrupt completion (for-await-of statement)
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esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
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features: [Symbol.iterator, destructuring-binding, async-iteration]
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flags: [generated, async]
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info: |
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IterationStatement :
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for await ( ForDeclaration of AssignmentExpression ) Statement
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[...]
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2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
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lexicalBinding, labelSet, async).
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13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
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[...]
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4. Let destructuring be IsDestructuring of lhs.
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[...]
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6. Repeat
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[...]
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j. If destructuring is false, then
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[...]
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k. Else
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i. If lhsKind is assignment, then
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[...]
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ii. Else if lhsKind is varBinding, then
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[...]
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iii. Else,
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1. Assert: lhsKind is lexicalBinding.
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2. Assert: lhs is a ForDeclaration.
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3. Let status be the result of performing BindingInitialization
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for lhs passing nextValue and iterationEnv as arguments.
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[...]
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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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SingleNameBinding : BindingIdentifier Initializer_opt
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[...]
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3. If iteratorRecord.[[done]] is false, then
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a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
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b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
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c. ReturnIfAbrupt(next).
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d. If next is false, set iteratorRecord.[[done]] to true.
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e. Else,
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i. Let v be IteratorValue(next).
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ii. If v is an abrupt completion, set iteratorRecord.[[done]] to
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true.
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iii. ReturnIfAbrupt(v).
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---*/
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var poisonedValue = Object.defineProperty({}, 'value', {
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get: function() {
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throw new Test262Error();
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}
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});
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var g = {};
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g[Symbol.iterator] = function() {
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return {
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next() {
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return poisonedValue;
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}
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};
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};
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async function * gen() {
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for await (const [x] of [g]) {
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return;
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}
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}
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gen().next()
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.then(_ => {
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throw new Test262Error("Expected async function to reject, but resolved.");
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}, ({ constructor }) => {
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assert.sameValue(constructor, Test262Error);
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})
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.then($DONE, $DONE);
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