error[E0382]: use of moved value: `s`
  --> $DIR/issue-29723.rs:12:13
   |
LL |     let s = String::new();
   |         - move occurs because `s` has type `String`, which does not implement the `Copy` trait
LL |     let _s = match 0 {
LL |         0 if { drop(s); false } => String::from("oops"),
   |                     - value moved here
...
LL |             s
   |             ^ value used here after move
   |
help: consider cloning the value if the performance cost is acceptable
   |
LL |         0 if { drop(s.clone()); false } => String::from("oops"),
   |                      ++++++++

error[E0382]: use of moved value: `s`
  --> $DIR/issue-29723.rs:20:14
   |
LL |     let s = String::new();
   |         - move occurs because `s` has type `String`, which does not implement the `Copy` trait
LL |     let _s = match 0 {
LL |         0 if let Some(()) = { drop(s); None } => String::from("oops"),
   |                                    - value moved here
LL |         _ => s
   |              ^ value used here after move
   |
help: consider cloning the value if the performance cost is acceptable
   |
LL |         0 if let Some(()) = { drop(s.clone()); None } => String::from("oops"),
   |                                     ++++++++

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0382`.