https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102802
TC <rs2740 at gmail dot com> changed:
What |Removed |Added
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CC| |rs2740 at gmail dot com
--- Comment #3 from TC <rs2740 at gmail dot com> ---
No, this is valid. B's operator() is not visible, but its conversion to
function pointer is, and that introduces a surrogate call function during the
overload resolution for the function call expression (and it's selected because
it is the only viable candidate).
