https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125111
Bug ID: 125111
Summary: [reflection] "internal compiler error: error reporting
routines re-entered" when calling`std::meta::extract`
with reference to function
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ensadc at mailnesia dot com
Target Milestone: ---
https://godbolt.org/z/MsG4qxd6e
====
#include <meta>
using FT = void();
extern FT& f;
constexpr auto x = ^^f;
constexpr auto pf = std::meta::extract<FT&>(x);
====
Compiling above with `-std=c++26 -freflection` leads to "error: arrays of
functions are not meaningful" and then "internal compiler error: error
reporting routines re-entered."
It seems that GCC is trying to form `FT(*)[]` as required by N5032
[meta.reflection.extract]/(5.2), but gets mad in this process.
Even if there's no ICE, the error message could be improved.
