error: lifetime in trait object type must be followed by `+`
  --> $DIR/gat-trait-path-parenthesised-args.rs:7:29
   |
LL | fn foo<'a>(arg: Box<dyn X<Y('a) = &'a ()>>) {}
   |                             ^^

error: parenthesized generic arguments cannot be used in associated type constraints
  --> $DIR/gat-trait-path-parenthesised-args.rs:7:27
   |
LL | fn foo<'a>(arg: Box<dyn X<Y('a) = &'a ()>>) {}
   |                           ^^^^^
   |
help: use angle brackets instead
   |
LL | fn foo<'a>(arg: Box<dyn X<Y<'a> = &'a ()>>) {}
   |                            ~  ~

error: parenthesized generic arguments cannot be used in associated type constraints
  --> $DIR/gat-trait-path-parenthesised-args.rs:14:27
   |
LL | fn bar<'a>(arg: Box<dyn X<Y() = ()>>) {}
   |                           ^--
   |                            |
   |                            help: remove these parentheses

error[E0107]: this associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
  --> $DIR/gat-trait-path-parenthesised-args.rs:7:27
   |
LL | fn foo<'a>(arg: Box<dyn X<Y('a) = &'a ()>>) {}
   |                           ^ expected 1 lifetime argument
   |
note: associated type defined here, with 1 lifetime parameter: `'a`
  --> $DIR/gat-trait-path-parenthesised-args.rs:4:8
   |
LL |   type Y<'a>;
   |        ^ --
help: add missing lifetime argument
   |
LL | fn foo<'a>(arg: Box<dyn X<Y('a, 'a) = &'a ()>>) {}
   |                             +++

error[E0107]: this associated type takes 0 generic arguments but 1 generic argument was supplied
  --> $DIR/gat-trait-path-parenthesised-args.rs:7:27
   |
LL | fn foo<'a>(arg: Box<dyn X<Y('a) = &'a ()>>) {}
   |                           ^---- help: remove these generics
   |                           |
   |                           expected 0 generic arguments
   |
note: associated type defined here, with 0 generic parameters
  --> $DIR/gat-trait-path-parenthesised-args.rs:4:8
   |
LL |   type Y<'a>;
   |        ^

error[E0107]: this associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
  --> $DIR/gat-trait-path-parenthesised-args.rs:14:27
   |
LL | fn bar<'a>(arg: Box<dyn X<Y() = ()>>) {}
   |                           ^ expected 1 lifetime argument
   |
note: associated type defined here, with 1 lifetime parameter: `'a`
  --> $DIR/gat-trait-path-parenthesised-args.rs:4:8
   |
LL |   type Y<'a>;
   |        ^ --
help: add missing lifetime argument
   |
LL | fn bar<'a>(arg: Box<dyn X<Y('a) = ()>>) {}
   |                             ++

error: aborting due to 6 previous errors

For more information about this error, try `rustc --explain E0107`.