From a61ca095a92fb036e7a79c081514d312abaec40f Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 2 Jan 2006 19:55:31 +0000
Subject: [PATCH] Reset flex state in a way that works for both flex 2.5.4 and
 2.5.31.

---
 src/backend/utils/misc/guc-file.l | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/backend/utils/misc/guc-file.l b/src/backend/utils/misc/guc-file.l
index f1658ed3901..766dede0c98 100644
--- a/src/backend/utils/misc/guc-file.l
+++ b/src/backend/utils/misc/guc-file.l
@@ -4,7 +4,7 @@
  *
  * Copyright (c) 2000-2005, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/backend/utils/misc/guc-file.l,v 1.32.2.1 2006/01/01 19:53:48 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/misc/guc-file.l,v 1.32.2.2 2006/01/02 19:55:31 tgl Exp $
  */
 
 %{
@@ -157,8 +157,7 @@ ProcessConfigFile(GucContext context)
 	/*
 	 * Parse
 	 */
-	yyin = fp;
-	YY_FLUSH_BUFFER;			/* in case we abandoned a prior scan */
+	yyrestart(fp);
 	head = tail = NULL;
 	opt_name = opt_value = NULL;
 	ConfigFileLineno = 1;