Auto merge of #58389 - Centril:rollup, r=Centril

Rollup of 11 pull requests

Successful merges:

 - #58105 (libarena => 2018)
 - #58111 (libterm => 2018)
 - #58287 (rustc-std-workspace-core => 2018)
 - #58288 (rustc-workspace-hack => 2018)
 - #58300 (librustc_typeck => 2018)
 - #58313 (Use `?` in librustc macros)
 - #58318 (libserialize => 2018)
 - #58322 (librustc_codegen_ssa => 2018)
 - #58342 (Revert removed #![feature(nll)])
 - #58367 (Remove two dead functions.)
 - #58382 (docs: remove "experimental" wording from std::os::unix)

Failed merges:

r? @ghost

Author: bors

lib.rs

@@ -276,6 +276,7 @@
 
 #![deny(rust_2018_idioms)]
 
+#![feature(nll)]
 #![feature(str_escape)]
 
 use LabelText::*;