error[E0308]: mismatched types
  --> $DIR/return-dyn-type-mismatch.rs:15:21
   |
LL |     fn other_func() -> dyn TestTrait<MyType = T> {
   |                        ------------------------- expected `(dyn TestTrait<MyType = T> + 'static)` because of return type
LL |         match Self::func() {
LL |             None => None,
   |                     ^^^^ expected `dyn TestTrait`, found `Option<_>`
   |
   = note: expected trait object `(dyn TestTrait<MyType = T> + 'static)`
                      found enum `Option<_>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.