error[E0382]: use of moved value: `hello`
  --> $DIR/not-copy-closure.rs:10:9
   |
LL |     let b = hello;
   |         - value moved here
LL |     let c = hello;
   |         ^ value used here after move
   |
note: closure cannot be invoked more than once because it moves the variable `a` out of its environment
  --> $DIR/not-copy-closure.rs:6:9
   |
LL |         a += 1;
   |         ^

error: aborting due to previous error

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