Revert removed #![feature(nll)]

Author: taiki-e

src/libfmt_macros/lib.rs

@@ -10,6 +10,7 @@
 
 #![deny(rust_2018_idioms)]
 
+#![feature(nll)]
 #![feature(rustc_private)]
 
 pub use Piece::*;

src/libgraphviz/lib.rs

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

src/libpanic_abort/lib.rs

@@ -14,6 +14,7 @@
 
 #![feature(core_intrinsics)]
 #![feature(libc)]
+#![feature(nll)]
 #![feature(panic_runtime)]
 #![feature(staged_api)]
 #![feature(rustc_attrs)]

src/libproc_macro/lib.rs

@@ -17,6 +17,7 @@
 
 #![deny(rust_2018_idioms)]
 
+#![feature(nll)]
 #![feature(staged_api)]
 #![feature(const_fn)]
 #![feature(extern_types)]

src/libprofiler_builtins/lib.rs

@@ -5,5 +5,6 @@
             reason = "internal implementation detail of rustc right now",
             issue = "0")]
 #![allow(unused_features)]
+#![feature(nll)]
 #![feature(staged_api)]
 #![deny(rust_2018_idioms)]

src/librustc_allocator/lib.rs

@@ -1,3 +1,4 @@
+#![feature(nll)]
 #![feature(rustc_private)]
 
 #![deny(rust_2018_idioms)]

src/librustc_apfloat/lib.rs

@@ -34,6 +34,7 @@
 #![forbid(unsafe_code)]
 #![deny(rust_2018_idioms)]
 
+#![feature(nll)]
 #![feature(try_from)]
 // See librustc_cratesio_shim/Cargo.toml for a comment explaining this.
 #[allow(unused_extern_crates)]

src/librustc_asan/lib.rs

@@ -1,4 +1,5 @@
 #![sanitizer_runtime]
+#![feature(nll)]
 #![feature(sanitizer_runtime)]
 #![feature(staged_api)]
 #![no_std]

src/librustc_errors/lib.rs

@@ -4,6 +4,7 @@
 #![allow(unused_attributes)]
 #![feature(range_contains)]
 #![cfg_attr(unix, feature(libc))]
+#![feature(nll)]
 #![feature(optin_builtin_traits)]
 #![deny(rust_2018_idioms)]
 

src/librustc_llvm/lib.rs

@@ -1,4 +1,5 @@
 #![deny(rust_2018_idioms)]
+#![feature(nll)]
 #![feature(static_nobundle)]
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]