change `FnMutDelegate` to trait objects

[rust.git] / compiler / rustc_infer / src / lib.rs

diff --git a/compiler/rustc_infer/src/lib.rs b/compiler/rustc_infer/src/lib.rs
index 602a9ab13f37792b9a0fdadce06d4f839aadba0e..931ebca7d014524a579c16c78355a2c0e0c74c03 100644 (file)
--- a/compiler/rustc_infer/src/lib.rs
+++ b/compiler/rustc_infer/src/lib.rs
@@ -18,6 +18,7 @@
 #![feature(control_flow_enum)]
 #![feature(extend_one)]
 #![cfg_attr(bootstrap, feature(label_break_value))]
+#![feature(let_chains)]
 #![feature(let_else)]
 #![feature(min_specialization)]
 #![feature(never_type)]