error: expected one of `:`, `@`, or `|`, found `<`
  --> $DIR/issue-64252-self-type.rs:4:15
   |
LL | pub fn foo(Box<Self>) { }
   |               ^ expected one of `:`, `@`, or `|`
   |
   = note: anonymous parameters are removed in the 2018 edition (see RFC 1685)
help: if this is a `self` type, give it a parameter name
   |
LL | pub fn foo(self: Box<Self>) { }
   |            +++++
help: if this is a type, explicitly ignore the parameter name
   |
LL | pub fn foo(_: Box<Self>) { }
   |            ++

error: expected one of `:`, `@`, or `|`, found `<`
  --> $DIR/issue-64252-self-type.rs:10:15
   |
LL |     fn bar(Box<Self>) { }
   |               ^ expected one of `:`, `@`, or `|`
   |
   = note: anonymous parameters are removed in the 2018 edition (see RFC 1685)
help: if this is a `self` type, give it a parameter name
   |
LL |     fn bar(self: Box<Self>) { }
   |            +++++
help: if this is a type, explicitly ignore the parameter name
   |
LL |     fn bar(_: Box<Self>) { }
   |            ++

error: aborting due to 2 previous errors

