From b6a3917b0555a0fdaee7c3f13423009f4f4b878d Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <serg@mariadb.org>
Date: Tue, 24 Jan 2017 00:01:25 +0100
Subject: MDEV-11750 Assertion `vfield' failed in TABLE::update_virtual_fields
 after crash recovery on corrupted MyISAM table

Adjust the length of the BIT field
(same as in _mi_put_key_in_record())
---
 storage/myisam/mi_open.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'storage/myisam')

diff --git a/storage/myisam/mi_open.c b/storage/myisam/mi_open.c
index 604dd1674ae..5bd5554db51 100644
--- a/storage/myisam/mi_open.c
+++ b/storage/myisam/mi_open.c
@@ -376,6 +376,8 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
           {
             uint real_length= pos->flag & HA_BLOB_PART ? pos->bit_start
                                                        : pos->length;
+            if (pos->type == HA_KEYTYPE_BIT && pos->bit_length)
+              real_length--;
             set_if_bigger(share->vreclength, pos->start + real_length);
           }
 	}
-- 
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