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Date: Sun, 17 Jan 2021 20:55:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98687

--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
Another test case:

void a();
namespace b {
using ::a;
}
namespace c {
template <class> void a();
template <typename d, typename e> void f(d, e) {
  using b::a;
  using c::a;
}
template <class g, class h, class e> void i(g j, h, e k) { f(j, k); }
} // namespace c
class l {
  double m() const;
};
using c::i;
double l::m() const { i(0, 0, int()); }=