error[E0106]: missing lifetime specifier
  --> $DIR/issue-26638.rs:1:62
   |
LL | fn parse_type(iter: Box<dyn Iterator<Item=&str>+'static>) -> &str { iter.next() }
   |                     ------------------------------------     ^ expected named lifetime parameter
   |
   = help: this function's return type contains a borrowed value, but the signature does not say which one of `iter`'s 2 lifetimes it is borrowed from
help: consider introducing a named lifetime parameter
   |
LL | fn parse_type<'a>(iter: Box<dyn Iterator<Item=&str>+'static>) -> &'a str { iter.next() }
   |              ^^^^                                                ^^^

error[E0106]: missing lifetime specifier
  --> $DIR/issue-26638.rs:4:40
   |
LL | fn parse_type_2(iter: fn(&u8)->&u8) -> &str { iter() }
   |                                        ^ expected named lifetime parameter
   |
   = help: this function's return type contains a borrowed value with an elided lifetime, but the lifetime cannot be derived from the arguments
help: consider using the `'static` lifetime
   |
LL | fn parse_type_2(iter: fn(&u8)->&u8) -> &'static str { iter() }
   |                                        ^^^^^^^^

error[E0106]: missing lifetime specifier
  --> $DIR/issue-26638.rs:7:22
   |
LL | fn parse_type_3() -> &str { unimplemented!() }
   |                      ^ expected named lifetime parameter
   |
   = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
help: consider using the `'static` lifetime
   |
LL | fn parse_type_3() -> &'static str { unimplemented!() }
   |                      ^^^^^^^^

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0106`.