From ffbde9f44a4cb91e05d2f8524d24c6ac6cad66c6 Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Thu, 19 Dec 2019 17:19:55 +0100
Subject: [PATCH] is_binding_pat: don't use _ arm

---
 src/librustc/middle/region.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/librustc/middle/region.rs b/src/librustc/middle/region.rs
index aa6f28398289..b33101ad78b9 100644
--- a/src/librustc/middle/region.rs
+++ b/src/librustc/middle/region.rs
@@ -1221,7 +1221,14 @@ fn resolve_local<'tcx>(
                 is_binding_pat(&subpat)
             }
 
-            _ => false,
+            PatKind::Or(_) |
+            PatKind::Ref(_, _) |
+            PatKind::Binding(hir::BindingAnnotation::Unannotated, ..) |
+            PatKind::Binding(hir::BindingAnnotation::Mutable, ..) |
+            PatKind::Wild |
+            PatKind::Path(_) |
+            PatKind::Lit(_) |
+            PatKind::Range(_, _, _) => false,
         }
     }