1 error: invalid `?` in type
2 --> $DIR/issue-84148-1.rs:1:14
5 | ^ `?` is only allowed on expressions, not types
7 help: if you meant to express that the type might not contain a value, use the `Option` wrapper type
9 LL | fn f(t:Option<for<>t>)
12 error: expected one of `->`, `where`, or `{`, found `<eof>`
13 --> $DIR/issue-84148-1.rs:1:15
16 | ^ expected one of `->`, `where`, or `{`
18 error: aborting due to 2 previous errors