var-ary-ptrn-elem-id-iter-step-err.js (1790B)
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/for-of-var.template 4 /*--- 5 description: Error forwarding when IteratorStep 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 45 ---*/ 46 var g = {}; 47 g[Symbol.iterator] = function() { 48 return { 49 next: function() { 50 throw new Test262Error(); 51 } 52 }; 53 }; 54 55 assert.throws(Test262Error, function() { 56 for (var [x] of [g]) { 57 return; 58 } 59 }); 60 61 reportCompare(0, 0);