error: unused variable: `a`
  --> $DIR/param-attrs-cfg.rs:24:23
   |
LL |     #[cfg(something)] a: i32,
   |                       ^ help: if this is intentional, prefix it with an underscore: `_a`
   |
note: the lint level is defined here
  --> $DIR/param-attrs-cfg.rs:5:9
   |
LL | #![deny(unused_variables)]
   |         ^^^^^^^^^^^^^^^^

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:30:23
   |
LL |     #[cfg(something)] b: i32,
   |                       ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:32:40
   |
LL |     #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                        ^ help: if this is intentional, prefix it with an underscore: `_c`

error: unused variable: `a`
  --> $DIR/param-attrs-cfg.rs:107:27
   |
LL |         #[cfg(something)] a: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_a`

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:113:27
   |
LL |         #[cfg(something)] b: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:115:44
   |
LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:67:27
   |
LL |         #[cfg(something)] b: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:69:44
   |
LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:75:27
   |
LL |         #[cfg(something)] b: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:77:44
   |
LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`

error: unused variable: `a`
  --> $DIR/param-attrs-cfg.rs:41:27
   |
LL |         #[cfg(something)] a: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_a`

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:48:27
   |
LL |         #[cfg(something)] b: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:50:44
   |
LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:56:27
   |
LL |         #[cfg(something)] b: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:58:44
   |
LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:86:27
   |
LL |         #[cfg(something)] b: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:88:44
   |
LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`

error: unused variable: `b`
  --> $DIR/param-attrs-cfg.rs:94:27
   |
LL |         #[cfg(something)] b: i32,
   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`

error: unused variable: `c`
  --> $DIR/param-attrs-cfg.rs:96:44
   |
LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`

error: aborting due to 19 previous errors