var-ary-ptrn-rest-id-iter-val-err.js (2025B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-rest-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 BindingRestElement : ... BindingIdentifier 37 1. Let lhs be ResolveBinding(StringValue of BindingIdentifier, 38 environment). 39 2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat, 40 [...] 41 c. Let nextValue be IteratorValue(next). 42 d. If nextValue is an abrupt completion, set iteratorRecord.[[done]] to 43 true. 44 e. ReturnIfAbrupt(nextValue). 45 46 ---*/ 47 var poisonedValue = Object.defineProperty({}, 'value', { 48 get: function() { 49 throw new Test262Error(); 50 } 51 }); 52 var iter = {}; 53 iter[Symbol.iterator] = function() { 54 return { 55 next: function() { 56 return poisonedValue; 57 } 58 }; 59 }; 60 61 assert.throws(Test262Error, function() { 62 for (var [...x] of [iter]) { 63 return; 64 } 65 }); 66 67 reportCompare(0, 0);