mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-24 07:44:10 +00:00
22 lines
421 B
Rust
22 lines
421 B
Rust
// Creating a stack closure which references a box and then
|
|
// transferring ownership of the box before invoking the stack
|
|
// closure results in a crash.
|
|
|
|
|
|
|
|
fn twice(x: Box<usize>) -> usize {
|
|
*x * 2
|
|
}
|
|
|
|
fn invoke<F>(f: F) where F: FnOnce() -> usize {
|
|
f();
|
|
}
|
|
|
|
fn main() {
|
|
let x : Box<usize> = Box::new(9);
|
|
let sq = || { *x * *x };
|
|
|
|
twice(x); //~ ERROR: cannot move out of
|
|
invoke(sq);
|
|
}
|