https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102251
Bug ID: 102251
Summary: Valid code is rejected in ternary operator with unique
conversion
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
Ternary operator ?: here must convert A into B using B::B(const A &)
```
#include <type_traits>
class A;
struct B {
B() {}
B(const A &) {}
};
class A : B {};
static_assert(std::is_convertible_v<A, B>);
int main() {
void( true ? B{} : A{} );
}
```
but GCC prints the error "'B' is an inaccessible base of 'A'"
Other compilers accept the code: https://gcc.godbolt.org/z/oxefo4h5n
