[Bug c++/90609] [9/10 Regression] Compilation error in std::function default member initialization inside template class with defaulted constructor

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90609

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

           What    |Removed                     |Added
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                 CC|                            |aoliva at gcc dot gnu.org
   Target Milestone|---                         |9.2

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a regression caused by r268850

            PR c++/87322
            * pt.c (tsubst_lambda_expr): Avoid duplicate tsubsting.
            Move cp_evaluated resetting before signature tsubsting.
            (gen_elem_of_pack_expansion_instantiation): Separate local
            specializations per index.