From 31f1bcdb2b10e780d6953b534444a86021eda604 Mon Sep 17 00:00:00 2001
From: Daniele Varrazzo <daniele.varrazzo@gmail.com>
Date: Mon, 15 Aug 2022 02:41:39 +0200
Subject: [PATCH] Fix segfault calling PQflush on invalid connection

---
 src/interfaces/libpq/fe-exec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/interfaces/libpq/fe-exec.c b/src/interfaces/libpq/fe-exec.c
index a36f5eb310d..8c2db77ba3f 100644
--- a/src/interfaces/libpq/fe-exec.c
+++ b/src/interfaces/libpq/fe-exec.c
@@ -3936,6 +3936,8 @@ PQisthreadsafe(void)
 int
 PQflush(PGconn *conn)
 {
+	if (!conn || conn->status == CONNECTION_BAD)
+		return -1;
 	return pqFlush(conn);
 }
 
-- 
2.25.1