--- /usr/lib/bison.simple	Thu Feb  3 12:33:38 2000
+++ bison.simple	Mon Jun 25 20:45:08 2001
@@ -130,6 +130,10 @@
 #endif /* not YYLSP_NEEDED */
 #endif
 
+#ifdef YYFREE
+void			YYFREE (YYSTYPE);
+#endif
+
 /* If nonreentrant, generate the variables here */
 
 #ifndef YYPURE
@@ -500,6 +504,9 @@
     yychar = YYEMPTY;
 
   *++yyvsp = yylval;
+#ifdef YYFREE
+  yylval = NULL;
+#endif
 #ifdef YYLSP_NEEDED
   *++yylsp = yylloc;
 #endif
@@ -594,6 +601,10 @@
 
 yyerrlab:   /* here on detecting error */
 
+#ifdef YYFREE
+  if (yylval) YYFREE (yylval);
+#endif
+
   if (! yyerrstatus)
     /* If not already recovering from an error, report this error.  */
     {
@@ -681,7 +692,13 @@
 yyerrpop:   /* pop the current state because it cannot handle the error token */
 
   if (yyssp == yyss) YYABORT;
+
+#ifdef YYFREE
+  YYFREE(*yyvsp--);
+#else
   yyvsp--;
+#endif
+
   yystate = *--yyssp;
 #ifdef YYLSP_NEEDED
   yylsp--;
@@ -728,6 +745,9 @@
 #endif
 
   *++yyvsp = yylval;
+#ifdef YYFREE
+  yylval = NULL;
+#endif
 #ifdef YYLSP_NEEDED
   *++yylsp = yylloc;
 #endif