| error[E0720]: cannot resolve opaque type | |
| --> $DIR/recursive-generator.rs:5:13 | |
| | | |
| LL | fn foo() -> impl Generator<Yield = (), Return = ()> { | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ recursive opaque type | |
| ... | |
| LL | let mut gen = Box::pin(foo()); | |
| | ------- generator captures itself here | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0720`. |