vim-patch:7.4.792

Problem:    Can only conceal text by defining syntax items.
Solution:   Use matchadd() to define concealing. (Christian Brabandt)

6561d52ecb

src/nvim/ex_docmd.c

@@ -9388,7 +9388,7 @@ static void ex_match(exarg_T *eap)
 
       c = *end;
       *end = NUL;
-      match_add(curwin, g, p + 1, 10, id, NULL);
+      match_add(curwin, g, p + 1, 10, id, NULL, NULL);
       xfree(g);
       *end = c;
     }