[rustc.git] / src / librustc_error_codes / error_codes / E0596.md

This error occurs because you tried to mutably borrow a non-mutable variable.

Erroneous code example:

```compile_fail,E0596
let x = 1;
let y = &mut x; // error: cannot borrow mutably
```

In here, `x` isn't mutable, so when we try to mutably borrow it in `y`, it
fails. To fix this error, you need to make `x` mutable:

```
let mut x = 1;
let y = &mut x; // ok!
```
Commit	Line	Data
60c5eb7d XL	1	This error occurs because you tried to mutably borrow a non-mutable variable.
	2
	3	Erroneous code example:
	4
	5	```compile_fail,E0596
	6	let x = 1;
	7	let y = &mut x; // error: cannot borrow mutably
	8	```
	9
	10	In here, `x` isn't mutable, so when we try to mutably borrow it in `y`, it
	11	fails. To fix this error, you need to make `x` mutable:
	12
	13	```
	14	let mut x = 1;
	15	let y = &mut x; // ok!
	16	```