warning: unnecessary parentheses around assigned value
  --> $DIR/suggestions.rs:59:21
   |
LL |         let mut a = (1);
   |                     ^^^ help: remove these parentheses
   |
note: lint level defined here
  --> $DIR/suggestions.rs:13:21
   |
LL | #![warn(unused_mut, unused_parens)] // UI tests pass `-A unused`—see Issue #43896
   |                     ^^^^^^^^^^^^^

warning: use of deprecated attribute `no_debug`: the `#[no_debug]` attribute was an experimental feature that has been deprecated due to lack of demand. See https://github.com/rust-lang/rust/issues/29721
  --> $DIR/suggestions.rs:52:1
   |
LL | #[no_debug] // should suggest removal of deprecated attribute
   | ^^^^^^^^^^^ help: remove this attribute
   |
   = note: #[warn(deprecated)] on by default

warning: variable does not need to be mutable
  --> $DIR/suggestions.rs:59:13
   |
LL |         let mut a = (1);
   |             ----^
   |             |
   |             help: remove this `mut`
   |
note: lint level defined here
  --> $DIR/suggestions.rs:13:9
   |
LL | #![warn(unused_mut, unused_parens)] // UI tests pass `-A unused`—see Issue #43896
   |         ^^^^^^^^^^

warning: variable does not need to be mutable
  --> $DIR/suggestions.rs:65:13
   |
LL |            let mut
   |   _____________^
   |  |_____________|
   | ||
LL | ||             b = 1;
   | ||____________-^
   |  |____________|
   |               help: remove this `mut`

error: const items should never be #[no_mangle]
  --> $DIR/suggestions.rs:16:14
   |
LL | #[no_mangle] const DISCOVERY: usize = 1;
   |              -----^^^^^^^^^^^^^^^^^^^^^^
   |              |
   |              help: try a static value: `pub static`
   |
   = note: #[deny(no_mangle_const_items)] on by default

warning: functions generic over types must be mangled
  --> $DIR/suggestions.rs:22:1
   |
LL | #[no_mangle]
   | ------------ help: remove this attribute
LL | //~^ HELP remove this attribute
LL | pub fn defiant<T>(_t: T) {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: #[warn(no_mangle_generic_items)] on by default

error: const items should never be #[no_mangle]
  --> $DIR/suggestions.rs:32:18
   |
LL |     #[no_mangle] pub const DAUNTLESS: bool = true;
   |                  ---------^^^^^^^^^^^^^^^^^^^^^^^^
   |                  |
   |                  help: try a static value: `pub static`

warning: functions generic over types must be mangled
  --> $DIR/suggestions.rs:35:18
   |
LL |     #[no_mangle] pub fn val_jean<T>() {}
   |     ------------ ^^^^^^^^^^^^^^^^^^^^^^^
   |     |
   |     help: remove this attribute

error: const items should never be #[no_mangle]
  --> $DIR/suggestions.rs:40:18
   |
LL |     #[no_mangle] pub(crate) const VETAR: bool = true;
   |                  ----------------^^^^^^^^^^^^^^^^^^^^
   |                  |
   |                  help: try a static value: `pub static`

warning: functions generic over types must be mangled
  --> $DIR/suggestions.rs:43:18
   |
LL |     #[no_mangle] pub(crate) fn crossfield<T>() {}
   |     ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |     |
   |     help: remove this attribute

warning: denote infinite loops with `loop { ... }`
  --> $DIR/suggestions.rs:56:5
   |
LL |     while true {
   |     ^^^^^^^^^^ help: use `loop`
   |
   = note: #[warn(while_true)] on by default

warning: the `warp_factor:` in this pattern is redundant
  --> $DIR/suggestions.rs:71:23
   |
LL |             Equinox { warp_factor: warp_factor } => {}
   |                       ------------^^^^^^^^^^^^
   |                       |
   |                       help: remove this
   |
   = note: #[warn(non_shorthand_field_patterns)] on by default

error: aborting due to 3 previous errors