Merge pull request #2123 from bugadani/feature

Re-add impl_trait_projections

examples/std/src/bin/net_ppp.rs

@@ -8,7 +8,8 @@
 //!     nc 192.168.7.10 1234
 
 #![feature(type_alias_impl_trait)]
-#![feature(async_fn_in_trait)]
+#![feature(async_fn_in_trait, impl_trait_projections)]
+#![allow(stable_features, unknown_lints, async_fn_in_trait)]
 
 #[path = "../serial_port.rs"]
 mod serial_port;