From 765524854cf08239729746c3138fb24a294af702 Mon Sep 17 00:00:00 2001
From: Anastasia <a.lubennikova@postgrespro.ru>
Date: Tue, 26 Sep 2017 20:13:23 +0300
Subject: [PATCH] do not call calc_checksum for non regular files. add an
 Assert

---
 src/backup.c | 3 ++-
 src/data.c   | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/backup.c b/src/backup.c
index 531c9c69..dfa2193f 100644
--- a/src/backup.c
+++ b/src/backup.c
@@ -1230,7 +1230,8 @@ pg_stop_backup(pgBackup *backup)
 			if (backup_files_list)
 			{
 				file = pgFileNew(tablespace_map, true);
-				calc_file_checksum(file);
+				if (S_ISREG(file->mode))
+					calc_file_checksum(file);
 				free(file->path);
 				file->path = strdup(PG_TABLESPACE_MAP_FILE);
 				parray_append(backup_files_list, file);
diff --git a/src/data.c b/src/data.c
index cb3d856f..74cc85e4 100644
--- a/src/data.c
+++ b/src/data.c
@@ -997,6 +997,7 @@ calc_file_checksum(pgFile *file)
 	struct stat	st;
 	pg_crc32	crc;
 
+	Assert(S_ISREG(file->mode));
 	INIT_CRC32C(crc);
 
 	/* reset size summary */