Closed
Description
when I use RefCell like after code.
use std::cell::RefCell;
fn test() -> bool {
let a = RefCell::new(5);
*a.borrow_mut() < 6 //error
//return *a.borrow_mut() < 6; // ok
}
fn main() {
test();
}https://is.gd/T8Wmps
will trigger a compile error
error: `a` does not live long enough
--> <anon>:5:6
|
5 | *a.borrow_mut() < 6 // error
| ^
|
note: reference must be valid for the destruction scope surrounding block at 3:18...
--> <anon>:3:19
|
3 | fn test() -> bool {
| ^
note: ...but borrowed value is only valid for the block suffix following statement 0 at 4:28
--> <anon>:4:29
|
4 | let a = RefCell::new(5);
| ^
error: aborting due to previous error
rustc --version --verbose
rustc 1.12.0-nightly (936bfea94 2016-07-20)
binary: rustc
commit-hash: 936bfea94b800551c972e5689ae7da86d3d601de
commit-date: 2016-07-20
host: x86_64-apple-darwin
release: 1.12.0-nightly
cargo --version --verbose
cargo 0.13.0-nightly (664125b 2016-07-19)
MacOS EI Capitan 10.11.6