exit status: 1 with stderr:
<stdin>:19:5: error: cannot convert value of type 'Box<_>' to expected argument type 'Box<Never>' Box() ^ <stdin>:1:12: note: arguments to generic parameter 'T' ('_' and 'Never') are expected to be equal struct Box<T> {} ^ <stdin>:19:5: error: generic parameter 'T' could not be inferred Box() ^ <stdin>:1:12: note: 'T' declared as parameter to type 'Box' struct Box<T> {} ^ <stdin>:19:5: note: explicitly specify the generic arguments to fix this issue Box() ^ <Any>