[Bug c++/123526] [16 Regression] Linking error when using standard exception as base class

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123526

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Better reduced testcase:
struct A {
  [[__gnu__::__gnu_inline__]]
  constexpr inline explicit A (int) {}
};
struct B : A {
  using A::A;
};

int
main ()
{
  throw B (42);
}

Here g++ makes the inherited ctor also gnu_inline, which is a bad idea.