[Bug c++/84610] [5/6/7/8 Regression] ICE in synthesize_implicit_template_parm, at cp/parser.c:38843

["dmalcolm at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84610

David Malcolm <dmalcolm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-02-28
                 CC|                            |dmalcolm at gcc dot gnu.org
            Summary|internal compiler error: in |[5/6/7/8 Regression] ICE in
                   |synthesize_implicit_templat |synthesize_implicit_templat
                   |e_parm, at                  |e_parm, at
                   |cp/parser.c:38843           |cp/parser.c:38843
     Ever confirmed|0                           |1

--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Confirmed on trunk, 5, 6 and 7 (with an explicit -std=c++14 needed for gcc 5).

Failing in synthesize_implicit_template_parm (parser=0x7ffff7ffbbd0,
constr=<tree 0x0>) at ../../src/gcc/cp/parser.c:38888

38888     gcc_assert (current_binding_level->kind == sk_function_parms);

(gdb) p cfun
$2 = (function *) 0x0
(gdb) p scope_chain->bindings->kind
$5 = sk_template_parms

Started with r208426 (with -std=c++14).