https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77890
--- Comment #3 from Jeff Mirwaisi <jeff.mirwaisi at gmail dot com> --- Bug 77912 is not a duplicate of this bug (77890), please see 77912 for details, unless 77890 is to be used as a general bug for all class template type deduction issues - if not Vittorio Romeo's example of failure with respect to local types should also be a standalone bug
