Bug#13654923 BOGUS DEBUG ASSERTION IN INDEX CREATION FOR ZERO-LENGTH RECORD

row_merge_buf_write(): Relax the bogus assertion.

mysql-test/suite/innodb_plugin/r/innodb-index.result

@@ -114,6 +114,10 @@ t12963823	CREATE TABLE `t12963823` (
   KEY `ndx_o` (`o`(500)),
   KEY `ndx_p` (`p`(500))
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC
+create table t1(a varchar(2) primary key) engine=innodb;
+insert into t1 values('');
+create index t1a1 on t1(a(1));
+drop table t1;
 set global innodb_file_per_table=0;
 set global innodb_file_format=Antelope;
 create table t1(a int not null, b int, c char(10) not null, d varchar(20)) engine = innodb;

mysql-test/suite/innodb_plugin/t/innodb-index.test

@@ -119,6 +119,11 @@ show create table t12963823;
 # this file complete before dropping the table.  By then, the purge thread
 # will have delt with the updates above.
 
+# Bug#13654923 BOGUS DEBUG ASSERTION IN INDEX CREATION FOR ZERO-LENGTH RECORD
+create table t1(a varchar(2) primary key) engine=innodb;
+insert into t1 values('');
+create index t1a1 on t1(a(1));
+drop table t1;
 
 eval set global innodb_file_per_table=$per_table;
 eval set global innodb_file_format=$format;

storage/innodb_plugin/row/row0merge.c

 /*****************************************************************************
 
-Copyright (c) 2005, 2010, Innobase Oy. All Rights Reserved.
+Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -576,7 +576,7 @@ row_merge_buf_write(
 						   REC_STATUS_ORDINARY,
 						   entry, n_fields,
 						   &extra_size);
-		ut_ad(size > extra_size);
+		ut_ad(size >= extra_size);
 		ut_ad(extra_size >= REC_N_NEW_EXTRA_BYTES);
 		extra_size -= REC_N_NEW_EXTRA_BYTES;
 		size -= REC_N_NEW_EXTRA_BYTES;