| error[E0382]: use of moved value: `a` | |
| --> $DIR/issue-31287-drop-in-guard.rs:5:9 | |
| | | |
| LL | let a = Some("...".to_owned()); | |
| | - move occurs because `a` has type `std::option::Option<std::string::String>`, which does not implement the `Copy` trait | |
| LL | let b = match a { | |
| LL | Some(_) if { drop(a); false } => None, | |
| | - value moved here | |
| LL | x => x, | |
| | ^ value used here after move | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0382`. |