mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-02 07:22:42 +00:00
23 lines
501 B
Rust
23 lines
501 B
Rust
// Test that assignments to an `&mut` pointer which is found in a
|
|
// borrowed (but otherwise non-aliasable) location is illegal.
|
|
|
|
struct S<'a> {
|
|
pointer: &'a mut isize
|
|
}
|
|
|
|
fn copy_borrowed_ptr<'a,'b>(p: &'a mut S<'b>) -> S<'b> {
|
|
S { pointer: &mut *p.pointer }
|
|
//~^ ERROR lifetime may not live long enough
|
|
}
|
|
|
|
fn main() {
|
|
let mut x = 1;
|
|
|
|
{
|
|
let mut y = S { pointer: &mut x };
|
|
let z = copy_borrowed_ptr(&mut y);
|
|
*y.pointer += 1;
|
|
*z.pointer += 1;
|
|
}
|
|
}
|