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error[E0382]: use of moved value: `my_str`
  --> $DIR/borrowck-drop-from-guard.rs:11:23
   |
LL |     let my_str = "hello".to_owned();
   |         ------ move occurs because `my_str` has type `String`, which does not implement the `Copy` trait
LL |     match Some(42) {
LL |         Some(_) if { drop(my_str); false } => {}
   |                           ------ value moved here
LL |         Some(_) => {}
LL |         None => { foo(my_str); }
   |                       ^^^^^^ value used here after move
   |
help: consider cloning the value if the performance cost is acceptable
   |
LL |         Some(_) if { drop(my_str.clone()); false } => {}
   |                                 ++++++++

error[E0382]: use of moved value: `my_str`
  --> $DIR/borrowck-drop-from-guard.rs:18:23
   |
LL |     let my_str = "hello".to_owned();
   |         ------ move occurs because `my_str` has type `String`, which does not implement the `Copy` trait
LL |     match Some(42) {
LL |         Some(_) if let Some(()) = { drop(my_str); None } => {}
   |                                          ------ value moved here
LL |         Some(_) => {}
LL |         None => { foo(my_str); }
   |                       ^^^^^^ value used here after move
   |
help: consider cloning the value if the performance cost is acceptable
   |
LL |         Some(_) if let Some(()) = { drop(my_str.clone()); None } => {}
   |                                                ++++++++

error: aborting due to 2 previous errors

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