[Bug libstdc++/68863] Regular expressions: Backreferences don't work in negative lookahead

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68863

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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   Target Milestone|---                         |4.9.4
      Known to fail|                            |4.9.3, 5.3.0