dflt-ary-ptrn-elem-id-iter-step-err.js (1342B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-id-iter-step-err.case 3 // - src/dstr-binding/error/async-gen-func-expr-dflt.template 4 /*--- 5 description: Error forwarding when IteratorStep returns an abrupt completion (async generator function expression (default parameter)) 6 esid: sec-asyncgenerator-definitions-evaluation 7 features: [Symbol.iterator, async-iteration] 8 flags: [generated] 9 info: | 10 AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) { 11 AsyncGeneratorBody } 12 13 [...] 14 3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 15 AsyncGeneratorBody, scope, strict). 16 [...] 17 18 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 19 20 SingleNameBinding : BindingIdentifier Initializeropt 21 22 [...] 23 4. If iteratorRecord.[[done]] is false, then 24 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 25 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 26 c. ReturnIfAbrupt(next). 27 28 ---*/ 29 var g = {}; 30 g[Symbol.iterator] = function() { 31 return { 32 next: function() { 33 throw new Test262Error(); 34 } 35 }; 36 }; 37 38 39 var f = async function*([x] = g) { 40 41 }; 42 43 assert.throws(Test262Error, function() { 44 f(); 45 }); 46 47 reportCompare(0, 0);