JSTests/test262/test/language/statements/variable/dstr/ary-ptrn-elem-id-iter-step-err.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-elem-id-iter-step-err.case
// - src/dstr-binding/error/var-stmt.template
/*---
description: Error forwarding when IteratorStep returns an abrupt completion (`var` statement)
esid: sec-variable-statement-runtime-semantics-evaluation
features: [Symbol.iterator, destructuring-binding]
flags: [generated]
info: |
    VariableDeclaration : BindingPattern Initializer

    1. Let rhs be the result of evaluating Initializer.
    2. Let rval be GetValue(rhs).
    3. ReturnIfAbrupt(rval).
    4. Return the result of performing BindingInitialization for
       BindingPattern passing rval and undefined as arguments.

    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    SingleNameBinding : BindingIdentifier Initializeropt

    [...]
    4. If iteratorRecord.[[done]] is false, then
       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
       c. ReturnIfAbrupt(next).

---*/
var g = {};
g[Symbol.iterator] = function() {
  return {
    next: function() {
      throw new Test262Error();
    }
  };
};

assert.throws(Test262Error, function() {
  var [x] = g;
});