var-ary-ptrn-elem-id-iter-val-err.js (2154B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-id-iter-val-err.case 3 // - src/dstr-binding/error/for-of-var.template 4 /*--- 5 description: Error forwarding when IteratorValue returns an abrupt completion (for-of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [Symbol.iterator, destructuring-binding] 8 flags: [generated] 9 info: | 10 IterationStatement : 11 for ( var ForBinding of AssignmentExpression ) Statement 12 13 [...] 14 3. Return ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, 15 varBinding, labelSet). 16 17 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 18 19 [...] 20 3. Let destructuring be IsDestructuring of lhs. 21 [...] 22 5. Repeat 23 [...] 24 h. If destructuring is false, then 25 [...] 26 i. Else 27 i. If lhsKind is assignment, then 28 [...] 29 ii. Else if lhsKind is varBinding, then 30 1. Assert: lhs is a ForBinding. 31 2. Let status be the result of performing BindingInitialization 32 for lhs passing nextValue and undefined as the arguments. 33 [...] 34 35 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 36 37 SingleNameBinding : BindingIdentifier Initializeropt 38 39 [...] 40 4. If iteratorRecord.[[done]] is false, then 41 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 42 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 43 c. ReturnIfAbrupt(next). 44 d. If next is false, set iteratorRecord.[[done]] to true. 45 e. Else, 46 i. Let v be IteratorValue(next). 47 ii. If v is an abrupt completion, set iteratorRecord.[[done]] to 48 true. 49 iii. ReturnIfAbrupt(v). 50 51 ---*/ 52 var poisonedValue = Object.defineProperty({}, 'value', { 53 get: function() { 54 throw new Test262Error(); 55 } 56 }); 57 var g = {}; 58 g[Symbol.iterator] = function() { 59 return { 60 next: function() { 61 return poisonedValue; 62 } 63 }; 64 }; 65 66 assert.throws(Test262Error, function() { 67 for (var [x] of [g]) { 68 return; 69 } 70 }); 71 72 reportCompare(0, 0);