foo.rs

struct Foo {
  thing: &int // errors don't happen unless this field is a borrowed pointer
}

impl Foo {
  fn run(&mut self) {
    self.foo();
    self.bar();
  }

  fn bar(&mut self) {}
  fn foo(&mut self) {}
}

gistfile1.txt

$ rustc --test foo.rs
foo.rs:8:4: 8:8 error: loan of dereference of mutable & pointer as mutable conflicts with prior loan
foo.rs:8     self.bar();
             ^~~~
foo.rs:7:4: 7:8 note: prior loan as mutable granted here
foo.rs:7     self.foo();
             ^~~~
error: aborting due to previous error