vim-patch:7.4.1580

Problem:    Crash when using function reference. (Luchr)
Solution:   Set initial refcount. (Ken Takata)

7a5c46a9df

src/nvim/eval.c

@@ -18340,6 +18340,7 @@ handle_subscript (
 
     // Turn "dict.Func" into a partial for "Func" with "dict".
     if (pt != NULL) {
+      pt->pt_refcount = 1;
       pt->pt_dict = selfdict;
       selfdict = NULL;
       pt->pt_name = rettv->vval.v_string;