error[E0404]: expected trait, found enum `ParseError`
  --> $DIR/issue-112472-multi-generics-suggestion.rs:17:54
   |
LL |     <DecodeLine as convert::TryFrom<String>>::Error: ParseError,
   |                                                      ^^^^^^^^^^ not a trait
   |
help: constrain the associated type to `ParseError`
   |
LL |     DecodeLine: convert::TryFrom<String, Error = ParseError>,
   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error[E0404]: expected trait, found enum `ParseError`
  --> $DIR/issue-112472-multi-generics-suggestion.rs:25:45
   |
LL |     <DecodeLine as TryFrom<String>>::Error: ParseError,
   |                                             ^^^^^^^^^^ not a trait
   |
help: constrain the associated type to `ParseError`
   |
LL |     DecodeLine: TryFrom<String, Error = ParseError>,
   |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0404`.