Comment 0 for bug 1691093

xtrabackup increment crashes with --prepare --apply-log-only and --throttle

/usr/bin/xtrabackup version 2.4.7 based on MySQL server 5.7.13 Linux (i686) (revision id: 6f7a799)

`/usr/bin/xtrabackup --defaults-file=/etc/mysql/percona-server.conf.d/mysqld.cnf --databases '"$DBNAMES"' --prepare --apply-log-only --password=XhXzmXQpoG3lFZ --throttle=40 --target-dir=/var/backups/mysql/daily/2017-05-16.Вторник/base --incremental-dir=/var/backups/mysql/daily/2017-05-16.Вторник/inc-2017-05-16.12h13m`

Thread pointer: 0x0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0 thread_stack 0x10000
/usr/bin/xtrabackup(my_print_stacktrace+0x3c)[0x89ffcdc]
/usr/bin/xtrabackup(handle_fatal_signal+0x254)[0x85eb2a4]
[0xb77d4c14]
/lib/i386-linux-gnu/libpthread.so.0(__pthread_mutex_lock+0x16)[0xb77b4826]
/usr/bin/xtrabackup(_Z14os_event_resetP8os_event+0x23)[0x84399d3]
/usr/bin/xtrabackup(_Z24xtrabackup_io_throttlingv+0x48)[0x82fc228]
/usr/bin/xtrabackup(_Z9copy_fileP7ds_ctxtPKcS2_j+0x1b5)[0x831ace5]
/usr/bin/xtrabackup(_Z30ibx_copy_incremental_over_fullv+0x401)[0x831cfd1]
/usr/bin/xtrabackup(_Z16apply_log_finishv+0x2d)[0x831d25d]
/usr/bin/xtrabackup[0x8304035]
/usr/bin/xtrabackup(main+0x954)[0x82e4214]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf7)[0xb70c0637]
/usr/bin/xtrabackup[0x82f7b40]

Please report a bug at https://bugs.launchpad.net/percona-xtrabackup
INC backup stage finished at Вт май 16 12:30:46 UTC 2017 code 0