--- gcc/config/i386/i386.c~	Tue Oct  3 03:44:07 2017
+++ gcc/config/i386/i386.c	Fri Oct 22 21:05:16 2021
@@ -7465,7 +7465,7 @@ function_arg_advance_32 (CUMULATIVE_ARGS *cum, machine
 			 HOST_WIDE_INT words)
 {
   int res = 0;
-  bool error_p = NULL;
+  bool error_p = false;
 
   switch (mode)
     {