error[E0499]: cannot borrow `thing` as mutable more than once at a time | |
--> $DIR/retain-resume-ref.rs:23:25 | |
| | |
LL | gen.as_mut().resume(&mut thing); | |
| ---------- first mutable borrow occurs here | |
LL | gen.as_mut().resume(&mut thing); | |
| ------ ^^^^^^^^^^ second mutable borrow occurs here | |
| | | |
| first borrow later used by call | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0499`. |