From: "Andrey V. Lepikhov" <a.lepikhov@postgrespro.ru>
Date: Sun, 16 Sep 2018 08:30:19 +0500
Subject: [PATCH] XML Bug fix

---
 src/backend/nodes/outfuncs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index 744a8b91b8..20eb033eac 100644
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -3310,7 +3310,7 @@ _outValue(StringInfo str, const Value *value)
 			 * but we don't want it to do anything with an empty string.
 			 */
 			appendStringInfoChar(str, '"');
-			if (value->val.str[0] != '\0')
+			if ((value->val.str) && (value->val.str[0] != '\0'))
 				outToken(str, value->val.str);
 			appendStringInfoChar(str, '"');
 			break;
-- 
2.17.1


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