From 8f8314b56003877185fb817c847c7c9609621d0c Mon Sep 17 00:00:00 2001
From: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: Wed, 29 Oct 2014 14:32:01 +0200
Subject: [PATCH] Reset error message at PQreset()

If you call PQreset() repeatedly, and the connection cannot be
re-established, the error messages from the failed connection attempts
kept accumulating in the error string.

Fixes bug #11455 reported by Caleb Epstein. Backpatch to all supported
versions.
---
 src/interfaces/libpq/fe-connect.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c
index b0b0e1a643..3fe8c21639 100644
--- a/src/interfaces/libpq/fe-connect.c
+++ b/src/interfaces/libpq/fe-connect.c
@@ -2895,6 +2895,7 @@ closePGconn(PGconn *conn)
 										 * absent */
 	conn->asyncStatus = PGASYNC_IDLE;
 	pqClearAsyncResult(conn);	/* deallocate result */
+	resetPQExpBuffer(&conn->errorMessage);
 	pg_freeaddrinfo_all(conn->addrlist_family, conn->addrlist);
 	conn->addrlist = NULL;
 	conn->addr_cur = NULL;