https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116385
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #1) > MSVC rejects the default argument usage: > > <source>(8): error C2587: 'n': illegal use of local variable as default > parameter > <source>(3): note: see declaration of 'n' > <source>(9): error C2587: 'n': illegal use of local variable as default > parameter > <source>(3): note: see declaration of 'n' And lambda usage: <source>(4): error C3493: 'n' cannot be implicitly captured because no default capture mode has been specified But accepts the usage in local class.