[Bug c/84953] misleading warning from strpbrk(x,"")

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84953

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/builtins.c.jj   2018-03-07 22:51:58.871478732 +0100
+++ gcc/builtins.c      2018-03-19 18:49:45.313898848 +0100
@@ -9573,7 +9573,7 @@ fold_builtin_strpbrk (location_t loc, tr
       if (p2[0] == '\0')
        /* strpbrk(x, "") == NULL.
           Evaluate and ignore s1 in case it had side-effects.  */
-       return omit_one_operand_loc (loc, TREE_TYPE (s1), integer_zero_node,
s1);
+       return omit_one_operand_loc (loc, type, integer_zero_node, s1);

       if (p2[1] != '\0')
        return NULL_TREE;  /* Really call strpbrk.  */