| // 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 LeftHandSideExpression of a Logical | |
| Assignment operator(??=) evaluates to an unresolvable reference | |
| flags: [onlyStrict] | |
| features: [logical-assignment-operators] | |
| ---*/ | |
| assert.throws(ReferenceError, function() { | |
| unresolved ??= 1; | |
| }); |