main.tc_heuristic_recover failed in buildbot with wrong error on mysqld_stub_cmd

main.tc_heuristic_recover 'xtradb'       w2 [ fail ]

        Test ended at 2018-02-01 15:27:07

CURRENT_TEST: main.tc_heuristic_recover

mysqltest: In included file "D:/win32-debug/build/src/mysql-test/include/fail_start_mysqld.inc": 

included from D:/win32-debug/build/src/mysql-test/t/tc_heuristic_recover.test at line 60:

At line 15: command "$mysqld_stub_cmd $restart_parameters >> $error_log  2>&1" failed with wrong error: 3

The result from queries just before the failure was:

< snip >

set debug_sync='RESET';

CREATE TABLE t1 (i INT) ENGINE=InnoDB;

SET GLOBAL innodb_flush_log_at_trx_commit=1;

FLUSH TABLES;

set debug_sync='ha_commit_trans_after_prepare WAIT_FOR go';

INSERT INTO t1 VALUES (1);;

# Prove that no COMMIT or ROLLBACK occurred yet.

SELECT * FROM t1;

i

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;

SELECT * FROM t1;

i

1

# Kill the server

More results from queries before failure can be found in D:\win32-debug\build\mysql-test\var\2\log\tc_heuristic_recover.log

 - saving 'D:/win32-debug/build/mysql-test/var/2/log/main.tc_heuristic_recover-xtradb/' to 'D:/win32-debug/build/mysql-test/var/log/main.tc_heuristic_recover-xtradb/'

Retrying test main.tc_heuristic_recover, attempt(2/3)...

***Warnings generated in error logs during shutdown after running tests: main.tc_heuristic_recover main.sp_trans_log

180201 15:27:00 [ERROR] Found 1 prepared transactions! It means that mysqld was not shut down properly last time and critical recovery information (last binlog or tc.log file) was manually deleted after a crash. You have to start mysqld with --tc-heuristic-recover switch to commit or rollback pending transactions.

180201 15:27:00 [ERROR] Aborting

abort() has been called180201 15:27:01 [ERROR] mysqld got exception 0x80000003 ;

Attempting backtrace. You can use the following information to find out