| // Copyright 2017 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: Group reference must have corresponding group. |
| info: | |
| It is a Syntax Error if the enclosing Pattern does not contain a |
| GroupSpecifier with an enclosed RegExpIdentifierName whose StringValue |
| equals the StringValue of the RegExpIdentifierName of this production's |
| GroupName. |
| esid: sec-patterns-static-semantics-early-errors |
| negative: |
| phase: parse |
| type: SyntaxError |
| features: [regexp-named-groups] |
| ---*/ |
| |
| $DONOTEVALUATE(); |
| |
| /(?<a>.)\k<b>/u; |
