Fix

Author: bjorn3

example/mini_core.rs

@@ -10,7 +10,7 @@
     auto_traits,
     freeze_impls
 )]
-#![cfg_attr(not(all(windows, target_env = "gnu")), thread_local)]
+#![cfg_attr(not(all(windows, target_env = "gnu")), feature(thread_local))]
 #![no_core]
 #![allow(dead_code, internal_features, ambiguous_wide_pointer_comparisons)]