# Old manifest: 2910f7d05f74e086c097595fe8cc78ad728474e4
# New manifest: 1b0c1a705781c50c81f1e0a3e6c5e89bd846c344
# Summary of changes:
# 
#   patch src/backend/access/transam/xlog.c
#    from 44af82f3c379aad3d842fc2b903d0211ecdd1e30
#      to 08dcb5592d1c8a9501dd6e8845c32b96710b987c
# 
--- src/backend/access/transam/xlog.c
+++ src/backend/access/transam/xlog.c
@@ -5266,6 +5266,14 @@
 		ereport(ERROR,
 				(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
 				 (errmsg("must be superuser to run a backup"))));
+
+	if (!XLogArchivingActive())
+		ereport(ERROR,
+				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+				 (errmsg("wal archiving is not configured"),
+				 (errhint("archive_command must be defined before using "
+					"online backups can be made safely")))));
+
 	backupidstr = DatumGetCString(DirectFunctionCall1(textout,
 											 PointerGetDatum(backupid)));