rust-book-cn/listings/ch15-smart-pointers/no-listing-01-cant-borrow-immutable-as-mutable/output.txt
2021-05-09 14:49:31 +08:00

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$ cargo run
Compiling borrowing v0.1.0 (file:///projects/borrowing)
error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
--> src/main.rs:3:13
|
2 | let x = 5;
| - help: consider changing this to be mutable: `mut x`
3 | let y = &mut x;
| ^^^^^^ cannot borrow as mutable
error: aborting due to previous error
For more information about this error, try `rustc --explain E0596`.
error: could not compile `borrowing`
To learn more, run the command again with --verbose.