| // Copyright (c) 2020 Ecma International. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-assignment-operators-runtime-semantics-evaluation |
| description: > |
| ReferenceError is thrown if the AssignmentExpression of a Logical |
| Assignment operator(??=) evaluates to an unresolvable reference and the |
| AssignmentExpression is evaluated. |
| features: [logical-assignment-operators] |
| |
| ---*/ |
| |
| var value = undefined; |
| |
| assert.throws(ReferenceError, function() { |
| value ??= unresolved; |
| }); |
| assert.sameValue(value, undefined, "value"); |