explain why we don't need to run type-checker when NLL is enabled

rust-lang · Feb 23, 2018 · bcd9968 · bcd9968
1 parent 2370b60
commit bcd9968
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/librustc_mir/borrow_check/nll/type_check/mod.rs b/src/librustc_mir/borrow_check/nll/type_check/mod.rs
@@ -1585,6 +1585,8 @@ impl MirPass for TypeckMir {
         let id = tcx.hir.as_local_node_id(def_id).unwrap();
         debug!("run_pass: {:?}", def_id);
 
+        // When NLL is enabled, the borrow checker runs the typeck
+        // itself, so we don't need this MIR pass anymore.
         if tcx.sess.nll() {
             return;
         }