error[E0658]: `#[thread_local]` is an experimental feature, and does not currently handle destructors. (see issue #29594)
  --> $DIR/feature-gate-thread_local.rs:18:1
   |
LL | #[thread_local] //~ ERROR `#[thread_local]` is an experimental feature
   | ^^^^^^^^^^^^^^^
   |
   = help: add #![feature(thread_local)] to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.