vim-patch:7.4.462

Problem:    Setting the local value of 'backupcopy' empty gives an error.
	    (Peter Mattern)
Solution:   When using an empty value set the flags to zero. (Hirohito
	    Higashi)

https://code.google.com/p/vim/source/detail?r=v7-4-462

src/nvim/option.c

@@ -3794,6 +3794,10 @@ did_set_string_option (
       flags = &curbuf->b_bkc_flags;
     }
 
+    if ((opt_flags & OPT_LOCAL) && *bkc == NUL) {
+      // make the local value empty: use the global value
+      *flags = 0;
+    } else {
       if (opt_strings_flags(bkc, p_bkc_values, flags, TRUE) != OK) {
         errmsg = e_invarg;
       }
@@ -3801,11 +3805,12 @@ did_set_string_option (
       if (((*flags & BKC_AUTO) != 0)
           + ((*flags & BKC_YES) != 0)
           + ((*flags & BKC_NO) != 0) != 1) {
-      /* Must have exactly one of "auto", "yes"  and "no". */
+        // Must have exactly one of "auto", "yes"  and "no".
         (void)opt_strings_flags(oldval, p_bkc_values, flags, TRUE);
         errmsg = e_invarg;
       }
     }
+  }
   /* 'backupext' and 'patchmode' */
   else if (varp == &p_bex || varp == &p_pm) {
     if (STRCMP(*p_bex == '.' ? p_bex + 1 : p_bex,

src/nvim/version.c

@@ -283,7 +283,7 @@ static int included_patches[] = {
   //465 NA
   //464 NA
   463,
-  //462,
+  462,
   //461 NA
   //460 NA
   //459 NA