--- a/modules/http/mod_mime.c  2017/06/05 12:10:05 1797652

+++ b/modules/http/mod_mime.c  2017/06/05 12:12:31 1797653

@@ -528,9 +528,9 @@

     int res = -1;

     int c;

-    if (((s + 1) != NULL) && (*s == '\\')) {

+    if (*s == '\\') {

         c = (int) *(s + 1);

-        if (apr_isascii(c)) {

+        if (c && apr_isascii(c)) {

             res = 1;

         }

     }