warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:8:5
   |
LL |     mut a: i32,
   |     ----^
   |     |
   |     help: remove this `mut`
   |
note: the lint level is defined here
  --> $DIR/lint-unused-mut-variables.rs:5:9
   |
LL | #![warn(unused_mut)]
   |         ^^^^^^^^^^

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:22:9
   |
LL |         mut a: i32,
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:13:5
   |
LL |     mut a: i32,
   |     ----^
   |     |
   |     help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:28:9
   |
LL |         mut a: i32,
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:38:9
   |
LL |         mut a: i32,
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:47:9
   |
LL |         mut a: i32,
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:56:9
   |
LL |         mut a: i32,
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:61:9
   |
LL |         mut a: i32,
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:106:14
   |
LL |     let x = |mut y: isize| 10;
   |              ----^
   |              |
   |              help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:68:9
   |
LL |     let mut a = 3;
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:70:9
   |
LL |     let mut a = 2;
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:72:9
   |
LL |     let mut b = 3;
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:74:9
   |
LL |     let mut a = vec![3];
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:76:10
   |
LL |     let (mut a, b) = (1, 2);
   |          ----^
   |          |
   |          help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:78:9
   |
LL |     let mut a;
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:82:9
   |
LL |     let mut b;
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:91:9
   |
LL |         mut x => {}
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:98:10
   |
LL |         (mut x, 1) |
   |          ----^
   |          |
   |          help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:111:9
   |
LL |     let mut a = &mut 5;
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:116:9
   |
LL |     let mut b = (&mut a,);
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:119:9
   |
LL |     let mut x = &mut 1;
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:131:9
   |
LL |     let mut v : &mut Vec<()> = &mut vec![];
   |         ----^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:186:9
   |
LL |     let mut raw_address_of_const = 1;
   |         ----^^^^^^^^^^^^^^^^^^^^
   |         |
   |         help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:108:13
   |
LL |     fn what(mut foo: isize) {}
   |             ----^^^
   |             |
   |             help: remove this `mut`

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:126:20
   |
LL |     fn mut_ref_arg(mut arg : &mut [u8]) -> &mut [u8] {
   |                    ----^^^
   |                    |
   |                    help: remove this `mut`

error: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:204:9
   |
LL |     let mut b = vec![2];
   |         ----^
   |         |
   |         help: remove this `mut`
   |
note: the lint level is defined here
  --> $DIR/lint-unused-mut-variables.rs:200:8
   |
LL | #[deny(unused_mut)]
   |        ^^^^^^^^^^

warning: variable does not need to be mutable
  --> $DIR/lint-unused-mut-variables.rs:211:28
   |
LL | fn write_through_reference(mut arg: &mut Arg) {
   |                            ----^^^
   |                            |
   |                            help: remove this `mut`

error: aborting due to 1 previous error; 26 warnings emitted