https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119964
Bug ID: 119964
Summary: GCC 15 does not delete explicitly-defaulted move
constructor with (const T&&) parameter
Product: gcc
Version: 15.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
GCC 15 accepts this program:
```
struct A {
int i;
constexpr A(int v) : i(v) {}
constexpr A(const A&&);
};
constexpr int f() {
A a(1);
A b = static_cast<const A&&>( a );
return b.i;
}
constexpr A::A(const A&&) = default;
static_assert( f() == 1 );
```
unlike GCC 14 and Clang. Online demo: https://gcc.godbolt.org/z/T9xexq54n
I guess the intention was to implicitly delete such constructor, and not to
define it.
