--- Compress-LZF/lzf_c_best.c	2015/06/29 23:51:28	1.3
+++ Compress-LZF/lzf_c_best.c	2019/03/03 11:33:55	1.4
@@ -85,6 +85,8 @@
 
   lit++; *op++ = *ip++;
 
+  &state; /* avoid undefined behaviour by forcing non-register class, 6.3.2.1p2 */
+
   while (ip < in_end - 2)
     {
       int best_l = 0;