mirror of https://github.com/tc39/test262.git
72 lines
2.3 KiB
JavaScript
72 lines
2.3 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding-for-await/ary-ptrn-rest-id-iter-step-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 IteratorStep 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: [generators, 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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BindingRestElement : ... BindingIdentifier
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1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
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environment).
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2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
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a. If iteratorRecord.[[done]] is false,
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i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
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ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
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true.
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iii. ReturnIfAbrupt(next).
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---*/
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var first = 0;
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var second = 0;
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var iter = function*() {
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first += 1;
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throw new Test262Error();
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second += 1;
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}();
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async function * gen() {
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for await (const [...x] of [iter]) {
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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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