[Bug c/104506] [12 Regression] ICE: tree check: expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p, at gimple-expr.cc:87 on invalid symbol redeclaration

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104506

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> Now do we want to add a check inside STRIP_USELESS_TYPE_CONVERSION for
> error_mark_node, I am still deciding.

Oh STRIP_TYPE_NOPS has a check for error_mark_node which was done in 2000 by
r0-29080 . So maybe it just should too.