JSTests/test262/test/language/statements/let/dstr/ary-ptrn-elem-id-init-unresolvable.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-elem-id-init-unresolvable.case
// - src/dstr-binding/error/let-stmt.template
/*---
description: Destructuring initializer is an unresolvable reference (`let` statement)
esid: sec-let-and-const-declarations-runtime-semantics-evaluation
es6id: 13.3.1.4
features: [destructuring-binding]
flags: [generated]
info: |
    LexicalBinding : BindingPattern Initializer

    1. Let rhs be the result of evaluating Initializer.
    2. Let value be GetValue(rhs).
    3. ReturnIfAbrupt(value).
    4. Let env be the running execution context's LexicalEnvironment.
    5. Return the result of performing BindingInitialization for BindingPattern
       using value and env as the arguments.

    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    SingleNameBinding : BindingIdentifier Initializeropt

    [...]
    6. If Initializer is present and v is undefined, then
       a. Let defaultValue be the result of evaluating Initializer.
       b. Let v be GetValue(defaultValue).
       c. ReturnIfAbrupt(v).

    6.2.3.1 GetValue (V)

    1. ReturnIfAbrupt(V).
    2. If Type(V) is not Reference, return V.
    3. Let base be GetBase(V).
    4. If IsUnresolvableReference(V), throw a ReferenceError exception.
---*/

assert.throws(ReferenceError, function() {
  let [ x = unresolvableReference ] = [];
});