Add LifetimeBinderKind::Closure

compiler/rustc_resolve/src/late.rs

@@ -268,6 +268,7 @@ enum LifetimeBinderKind {
     WhereBound,
     Item,
     Function,
+    Closure,
     ImplBlock,
 }
 
@@ -281,6 +282,7 @@ fn descr(self) -> &'static str {
             Item => "item",
             ImplBlock => "impl block",
             Function => "function",
+            Closure => "closure",
         }
     }
 }
@@ -3544,7 +3546,7 @@ fn resolve_expr(&mut self, expr: &'ast Expr, parent: Option<&'ast Expr>) {
                     NormalRibKind,
                     LifetimeRibKind::Generics {
                         binder: expr.id,
-                        kind: LifetimeBinderKind::Function,
+                        kind: LifetimeBinderKind::Closure,
                         span,
                     },
                     |this| visit::walk_expr(this, expr),