error[E0502]: cannot borrow `*f` as immutable because it is also borrowed as mutable --> $DIR/borrowck-overloaded-index-autoderef.rs:37:14 | LL | let p = &mut f[&s]; | - mutable borrow occurs here LL | let q = &f[&s]; | ^ immutable borrow occurs here LL | p.use_mut(); | ----------- mutable borrow later used here error[E0499]: cannot borrow `*f` as mutable more than once at a time --> $DIR/borrowck-overloaded-index-autoderef.rs:43:18 | LL | let p = &mut f[&s]; | - first mutable borrow occurs here LL | let q = &mut f[&s]; | ^ second mutable borrow occurs here LL | p.use_mut(); | ----------- first borrow later used here error[E0499]: cannot borrow `f.foo` as mutable more than once at a time --> $DIR/borrowck-overloaded-index-autoderef.rs:53:18 | LL | let p = &mut f.foo[&s]; | ----- first mutable borrow occurs here LL | let q = &mut f.foo[&s]; | ^^^^^ second mutable borrow occurs here LL | p.use_mut(); | ----------- first borrow later used here error[E0502]: cannot borrow `f.foo` as mutable because it is also borrowed as immutable --> $DIR/borrowck-overloaded-index-autoderef.rs:65:18 | LL | let p = &f.foo[&s]; | ----- immutable borrow occurs here LL | let q = &mut f.foo[&s]; | ^^^^^ mutable borrow occurs here LL | p.use_ref(); | ----------- immutable borrow later used here error[E0506]: cannot assign to `f.foo` because it is borrowed --> $DIR/borrowck-overloaded-index-autoderef.rs:71:5 | LL | let p = &f.foo[&s]; | ----- borrow of `f.foo` occurs here LL | f.foo = g; | ^^^^^^^^^ assignment to borrowed `f.foo` occurs here LL | p.use_ref(); | ----------- borrow later used here error[E0506]: cannot assign to `*f` because it is borrowed --> $DIR/borrowck-overloaded-index-autoderef.rs:77:5 | LL | let p = &f.foo[&s]; | ----- borrow of `*f` occurs here LL | *f = g; | ^^^^^^ assignment to borrowed `*f` occurs here LL | p.use_ref(); | ----------- borrow later used here error[E0506]: cannot assign to `f.foo` because it is borrowed --> $DIR/borrowck-overloaded-index-autoderef.rs:83:5 | LL | let p = &mut f.foo[&s]; | ----- borrow of `f.foo` occurs here LL | f.foo = g; | ^^^^^^^^^ assignment to borrowed `f.foo` occurs here LL | p.use_mut(); | ----------- borrow later used here error[E0506]: cannot assign to `*f` because it is borrowed --> $DIR/borrowck-overloaded-index-autoderef.rs:89:5 | LL | let p = &mut f.foo[&s]; | ----- borrow of `*f` occurs here LL | *f = g; | ^^^^^^ assignment to borrowed `*f` occurs here LL | p.use_mut(); | ----------- borrow later used here error: aborting due to 8 previous errors Some errors have detailed explanations: E0499, E0502, E0506. For more information about an error, try `rustc --explain E0499`.