502 Gateway Timeout with error exited on signal 7 (SIGBUS) after clearing cache (nginx with php5-fpm)

[Lukas Tribus]

> installed on a openVZ VPS with 24GB Ram and 12 Cores also tested on a
> physical machine with 32GB ram and 8 cores. both managed with ISPconfig3.
>
> PHP 5.4.39-1~dotdeb.1 (fpm-fcgi) (built: Mar 22 2015 08:08:54)
> nginx/1.6.2
> mysql

PHP crashes, report the problem to whoever is providing support for this
dotdeb package or install the proper package from your distribution.

Debian stable ships PHP 5.4.39, it doesn't make any sense to use dotdeb.