error[E0499]: cannot borrow `*x` as mutable more than once at a time --> $DIR/coerce-overloaded-autoderef-fail.rs:9:24 | LL | let y = borrow_mut(x); | - first mutable borrow occurs here LL | let z = borrow_mut(x); | ^ second mutable borrow occurs here LL | LL | drop((y, z)); | - first borrow later used here error[E0506]: cannot assign to `**x` because it is borrowed --> $DIR/coerce-overloaded-autoderef-fail.rs:17:5 | LL | let y = borrow(x); | - `**x` is borrowed here LL | let z = borrow(x); LL | **x += 1; | ^^^^^^^^ `**x` is assigned to here but it was already borrowed LL | LL | drop((y, z)); | - borrow later used here error[E0499]: cannot borrow `*x` as mutable more than once at a time --> $DIR/coerce-overloaded-autoderef-fail.rs:23:20 | LL | borrow_mut2(x, x); | ----------- - ^ second mutable borrow occurs here | | | | | first mutable borrow occurs here | first borrow later used by call error[E0502]: cannot borrow `*x` as mutable because it is also borrowed as immutable --> $DIR/coerce-overloaded-autoderef-fail.rs:28:5 | LL | borrow2(x, x); | -------^^^^-^ | | | | | immutable borrow occurs here | mutable borrow occurs here | immutable borrow later used by call error: aborting due to 4 previous errors Some errors have detailed explanations: E0499, E0502, E0506. For more information about an error, try `rustc --explain E0499`.