error[E0499]: cannot borrow `foo` as mutable more than once at a time --> $DIR/two-phase-multi-mut.rs:11:5 | LL | foo.method(&mut foo); | ^^^^------^--------^ | | | | | | | first mutable borrow occurs here | | first borrow later used by call | second mutable borrow occurs here error[E0499]: cannot borrow `foo` as mutable more than once at a time --> $DIR/two-phase-multi-mut.rs:11:16 | LL | foo.method(&mut foo); | --- ------ ^^^^^^^^ second mutable borrow occurs here | | | | | first borrow later used by call | first mutable borrow occurs here error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0499`.