text: // Copyright (C) 2015 the V8 project authors. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  description:
      lastIndex is advanced according to width of astral symbols following match success
  es6id: 21.2.5.11
  info: >
      21.2.5.11 RegExp.prototype [ @@split ] ( string, limit )
  
      [...]
      7. Let flags be ToString(Get(rx, "flags")).
      8. ReturnIfAbrupt(flags).
      9. If flags contains "u", let unicodeMatching be true.
      10. Else, let unicodeMatching be false.
      [...]
      24. Repeat, while q < size
          a. Let setStatus be Set(splitter, "lastIndex", q, true).
          b. ReturnIfAbrupt(setStatus).
          c. Let z be RegExpExec(splitter, S).
          d. ReturnIfAbrupt(z).
          e. If z is null, let q be AdvanceStringIndex(S, q, unicodeMatching).
          f. Else z is not null,
             i. Let e be ToLength(Get(splitter, "lastIndex")).
             ii. ReturnIfAbrupt(e).
             iii. If e = p, let q be AdvanceStringIndex(S, q, unicodeMatching).
  features: [Symbol.split]
  ---*/
  
  var result = /./u[Symbol.split]('\ud834\udf06');
  
  assert.sameValue(result.length, 2);
  assert.sameValue(result[0], '');
  assert.sameValue(result[1], '');
  