Strict mode Failing
Expected no error, got SyntaxError: warning: the variable "x" was not declared in anonymous function " 10#"
Features:
- Symbol.iterator
- destructuring-binding
Expected no error, got SyntaxError: warning: the variable "x" was not declared in anonymous function " 10#"
// This file was procedurally generated from the following sources:
// - src/dstr-assignment/array-elem-iter-thrw-close-skip.case
// - src/dstr-assignment/error/for-of.template
/*---
description: IteratorClose is not called when iteration produces an abrupt completion (For..of statement)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [Symbol.iterator, destructuring-binding]
flags: [generated]
info: |
IterationStatement :
for ( LeftHandSideExpression of AssignmentExpression ) Statement
1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
AssignmentExpression, iterate).
2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
keyResult, assignment, labelSet).
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
[...]
4. If destructuring is true and if lhsKind is assignment, then
a. Assert: lhs is a LeftHandSideExpression.
b. Let assignmentPattern be the parse of the source text corresponding to
lhs using AssignmentPattern as the goal symbol.
[...]
ArrayAssignmentPattern : [ AssignmentElementList ]
[...]
5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
result).
6. Return result.
---*/
var nextCount = 0;
var returnCount = 0;
var iterable = {};
var iterator = {
next: function() {
nextCount += 1;
throw new Test262Error();
},
return: function() {
returnCount += 1;
}
};
iterable[Symbol.iterator] = function() {
return iterator;
};
var _;
var counter = 0;
assert.throws(Test262Error, function() {
for ([ x ] of [iterable]) {
counter += 1;
}
counter += 1;
});
assert.sameValue(counter, 0);
assert.sameValue(nextCount, 1);
assert.sameValue(returnCount, 0);