https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87145
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-30
CC| |jason at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to programmer from comment #0)
> PS: Which version should I choose if multiple versions are affected: stable,
> trunk or [the first version with that regression]?
It doesn't really matter. We use other fields to track which versions the
regression affects.
Reduced:
template<typename T, T t> struct integral_constant {
static constexpr T value = t;
};
enum class Enum : unsigned {};
struct Pod {
unsigned val;
constexpr operator Enum() const {
return static_cast<Enum>(val);
}
};
template<unsigned N>
constexpr void foo() {
using Foo = integral_constant<Enum, Pod{N}>;
}
int main() {
foo<2>();
}
This started to ICE with r241425:
PR c++/77656
* pt.c (convert_template_argument): Call convert_nontype_argument
on value-dependent but not type-dependent arguments.
(convert_nontype_argument): Handle value-dependent arguments.
(canonicalize_expr_argument): New.
(deducible_expression, unify): Skip CONVERT_EXPR.
* error.c (dump_template_argument): Likewise.
* mangle.c (write_expression): Likewise.
And then started giving the current error with r257311 which relaxed an
assertion to stop the ICE:
PR c++/84125
* typeck.c (build_address): Relax the assert when
processing_template_decl.
Because of the ICE I can't tell when the error started.
