rust/tests/ui/borrowck/borrowck-mut-borrow-of-mut-base-ptr.stderr
2023-01-11 09:32:08 +00:00

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error[E0502]: cannot borrow `t0` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-mut-borrow-of-mut-base-ptr.rs:11:18
|
LL | let p: &isize = &*t0; // Freezes `*t0`
| ---- immutable borrow occurs here
LL | let mut t2 = &mut t0;
| ^^^^^^^ mutable borrow occurs here
LL | **t2 += 1; // Mutates `*t0`
LL | p.use_ref();
| ----------- immutable borrow later used here
error[E0499]: cannot borrow `t0` as mutable more than once at a time
--> $DIR/borrowck-mut-borrow-of-mut-base-ptr.rs:19:18
|
LL | let p: &mut isize = &mut *t0; // Claims `*t0`
| -------- first mutable borrow occurs here
LL | let mut t2 = &mut t0;
| ^^^^^^^ second mutable borrow occurs here
LL | **t2 += 1; // Mutates `*t0` but not through `*p`
LL | p.use_mut();
| ----------- first borrow later used here
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0499, E0502.
For more information about an error, try `rustc --explain E0499`.