From 827b951d099f8936f9899311038b8cae33ae87ef Mon Sep 17 00:00:00 2001
From: Brian Cloutier <brian@citusdata.com>
Date: Thu, 29 Mar 2018 23:38:31 +0000
Subject: [PATCH] Fix crash on Windows where there is no detail

---
 src/backend/distributed/commands/multi_copy.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/backend/distributed/commands/multi_copy.c b/src/backend/distributed/commands/multi_copy.c
index 370bb366c..66610c45b 100644
--- a/src/backend/distributed/commands/multi_copy.c
+++ b/src/backend/distributed/commands/multi_copy.c
@@ -1234,6 +1234,11 @@ ReportCopyError(MultiConnection *connection, PGresult *result)
 		/* probably a constraint violation, show remote message and detail */
 		char *remoteDetail = PQresultErrorField(result, PG_DIAG_MESSAGE_DETAIL);
 
+		if (remoteDetail == NULL)
+		{
+			remoteDetail = "(null)";
+		}
+
 		ereport(ERROR, (errmsg("%s", remoteMessage),
 						errdetail("%s", remoteDetail)));
 	}