let-ary-ptrn-elem-id-iter-step-err.js (1898B)
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-let.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 ( ForDeclaration of AssignmentExpression ) Statement 12 13 [...] 14 3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 15 lexicalBinding, 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 [...] 31 iii. Else, 32 1. Assert: lhsKind is lexicalBinding. 33 2. Assert: lhs is a ForDeclaration. 34 3. Let status be the result of performing BindingInitialization 35 for lhs passing nextValue and iterationEnv as arguments. 36 [...] 37 38 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 39 40 SingleNameBinding : BindingIdentifier Initializeropt 41 42 [...] 43 4. If iteratorRecord.[[done]] is false, then 44 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 45 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 46 c. ReturnIfAbrupt(next). 47 48 ---*/ 49 var g = {}; 50 g[Symbol.iterator] = function() { 51 return { 52 next: function() { 53 throw new Test262Error(); 54 } 55 }; 56 }; 57 58 assert.throws(Test262Error, function() { 59 for (let [x] of [g]) { 60 return; 61 } 62 }); 63 64 reportCompare(0, 0);