[Bug c++/124012] [reflection] ICE in gimplify_var_or_parm_decl, at gimplify.c:3426 when destructuring a type with std::meta::info member

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124012

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2026-02-07
                 CC|                            |mpolacek at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |mpolacek at gcc dot 
gnu.org
             Status|UNCONFIRMED                 |ASSIGNED
            Summary|ICE in                      |[reflection] ICE in
                   |gimplify_var_or_parm_decl,  |gimplify_var_or_parm_decl,
                   |at gimplify.c:3426 when     |at gimplify.c:3426 when
                   |destructuring a type with   |destructuring a type with
                   |std::meta::info member      |std::meta::info member
           Keywords|                            |ice-on-valid-code
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(gdb) up
#1  0x0000000000e0fcd3 in gimplify_var_or_parm_decl (expr_p=0x7fffe982b288)
    at /home/mpolacek/src/gcc/gcc/gimplify.cc:3426
3426          gcc_assert (seen_error ());
(gdb) p *expr_p
$1 = <var_decl 0x7fffe99c11c8>
(gdb) pge
D.2672
(gdb) trt
$3 = <record_type 0x7fffe99a99d8 extra_attributes>
(gdb) pge
const struct extra_attributes
(gdb) p consteval_only_p($3)
$4 = true

so we forgot to wipe a consteval-only var.  Mine I guess.