https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99790
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.5
CC| |jakub at gcc dot gnu.org
Priority|P3 |P2
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-03-26
Summary|internal compiler error: in |[8/9/10/11 Regression]
|expand_expr_real_2 |internal compiler error: in
| |expand_expr_real_2
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Original testcase (we always want them in bugzilla rather than some external
site):
#include <iostream>
#include <string_view>
#include <array>
template<typename T>
struct Variable{
std::string_view name;
void (*set)(T*);
};
struct test{
int var=0;
struct metadata{
static constexpr std::array<Variable<test>, 1> fields{
Variable<test>{"var",
[](test* obj){obj->*(&test::var)=42;}
}};
};
};
int main(){
test t;
test::metadata::fields[0].set(&t);
std::cout << t.var << "\n";
}
Reduced:
struct a {
constexpr a(const char *) : b{}, c{} {}
long b;
char c;
};
using d = a;
struct e;
struct f;
template <int> struct m { typedef e g; };
template <int h> struct o {
typename m<h>::g i;
void operator[](long) const;
};
struct e {
d j;
void (*k)(f *);
};
struct f {
int l;
struct p {
static constexpr o<1> fields{"", [](f *n) { n->*&f::l = 2; }};
};
};
int main() { f::p::fields[0]; }
With -std=c++1z started to ICE with
r7-3811-g253abb2a156c6ea7d1631bbe9da32070fdfe901b
