warning: useless assignment of variable of type `i32` to itself
  --> $DIR/self-assign.rs:10:5
   |
LL |     x = x;
   |     ^^^^^
   |
note: the lint level is defined here
  --> $DIR/self-assign.rs:6:9
   |
LL | #![warn(dead_code)]
   |         ^^^^^^^^^

warning: useless assignment of variable of type `i32` to itself
  --> $DIR/self-assign.rs:13:5
   |
LL |     x = (x);
   |     ^^^^^^^

warning: useless assignment of variable of type `S` to itself
  --> $DIR/self-assign.rs:22:5
   |
LL |     s = s;
   |     ^^^^^

warning: useless assignment of field of type `&str` to itself
  --> $DIR/self-assign.rs:25:5
   |
LL |     s.f = s.f;
   |     ^^^^^^^^^

warning: useless assignment of field of type `Box<i32>` to itself
  --> $DIR/self-assign.rs:34:5
   |
LL |     n3.n.0.n.x = n3.n.0.n.x;
   |     ^^^^^^^^^^^^^^^^^^^^^^^

warning: useless assignment of field of type `i32` to itself
  --> $DIR/self-assign.rs:38:5
   |
LL |     t.1.0.2.1 = t.1.0.2.1;
   |     ^^^^^^^^^^^^^^^^^^^^^

warning: 6 warnings emitted