error: `cfg(target_vendor)` is experimental and subject to change (see issue #29718)
  --> $DIR/feature-gate-cfg-target-vendor.rs:12:12
   |
12 | #[cfg_attr(target_vendor = "x", x)] //~ ERROR `cfg(target_vendor)` is experimental
   |            ^^^^^^^^^^^^^^^^^^^
   |
   = help: add #![feature(cfg_target_vendor)] to the crate attributes to enable

error: `cfg(target_vendor)` is experimental and subject to change (see issue #29718)
  --> $DIR/feature-gate-cfg-target-vendor.rs:11:7
   |
11 | #[cfg(target_vendor = "x")] //~ ERROR `cfg(target_vendor)` is experimental
   |       ^^^^^^^^^^^^^^^^^^^
   |
   = help: add #![feature(cfg_target_vendor)] to the crate attributes to enable

error: `cfg(target_vendor)` is experimental and subject to change (see issue #29718)
  --> $DIR/feature-gate-cfg-target-vendor.rs:15:19
   |
15 | #[cfg(not(any(all(target_vendor = "x"))))] //~ ERROR `cfg(target_vendor)` is experimental
   |                   ^^^^^^^^^^^^^^^^^^^
   |
   = help: add #![feature(cfg_target_vendor)] to the crate attributes to enable

error: `cfg(target_vendor)` is experimental and subject to change (see issue #29718)
  --> $DIR/feature-gate-cfg-target-vendor.rs:19:10
   |
19 |     cfg!(target_vendor = "x");
   |          ^^^^^^^^^^^^^^^^^^^
   |
   = help: add #![feature(cfg_target_vendor)] to the crate attributes to enable

error: aborting due to 4 previous errors