| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case |
| // - src/dstr-binding/error/async-gen-func-named-expr.template |
| /*--- |
| description: Error forwarding when IteratorStep returns an abrupt completion (async generator named function expression) |
| esid: sec-asyncgenerator-definitions-evaluation |
| features: [generators, async-iteration] |
| flags: [generated] |
| info: | |
| AsyncGeneratorExpression : async [no LineTerminator here] function * BindingIdentifier |
| ( FormalParameters ) { AsyncGeneratorBody } |
| |
| [...] |
| 7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, |
| AsyncGeneratorBody, funcEnv, strict). |
| [...] |
| |
| 13.3.3.6 Runtime Semantics: IteratorBindingInitialization |
| BindingRestElement : ... BindingIdentifier |
| 1. Let lhs be ResolveBinding(StringValue of BindingIdentifier, |
| environment). |
| 2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat, |
| a. If iteratorRecord.[[done]] is false, |
| i. Let next be IteratorStep(iteratorRecord.[[iterator]]). |
| ii. If next is an abrupt completion, set iteratorRecord.[[done]] to |
| true. |
| iii. ReturnIfAbrupt(next). |
| |
| ---*/ |
| var first = 0; |
| var second = 0; |
| var iter = function*() { |
| first += 1; |
| throw new Test262Error(); |
| second += 1; |
| }(); |
| |
| |
| var f; |
| f = async function* g([...x]) { |
| |
| }; |
| |
| assert.throws(Test262Error, function() { |
| f(iter); |
| }); |
| |
| iter.next(); |
| assert.sameValue(first, 1); |
| assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.'); |