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50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
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// - src/dstr-binding/error/async-gen-func-expr-dflt.template
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/*---
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description: Error forwarding when IteratorStep returns an abrupt completion (async generator function expression (default parameter))
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esid: sec-asyncgenerator-definitions-evaluation
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features: [generators, async-iteration]
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flags: [generated]
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info: |
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AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) {
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AsyncGeneratorBody }
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[...]
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3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters,
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AsyncGeneratorBody, scope, strict).
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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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var f = async function*([...x] = iter) {
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};
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assert.throws(Test262Error, function() {
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f();
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});
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iter.next();
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assert.sameValue(first, 1);
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assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
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