| error[E0276]: impl has stricter requirements than trait | |
| --> $DIR/trait-bound-on-type-parameter.rs:15:13 | |
| | | |
| LL | fn b<C,D>(&self, x: C) -> C; | |
| | ---------------------------- definition of `b` from trait | |
| ... | |
| LL | fn b<F: Sync, G>(&self, _x: F) -> F { panic!() } | |
| | ^^^^ impl has extra requirement `F: Sync` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0276`. |