Ubuntu 16.04: Zope instance terminated by SIGSEGV (core dumped)

Brand new installation of Plone 5.0.4 in brand new Ubuntu 16.04 DigitalOcean VM; Python 2.7.11+ installed.

I see these messages on supervisord.log:

2016-04-29 14:41:07,832 INFO exited: instance (terminated by SIGSEGV (core dumped); not expected)
2016-04-29 14:41:08,837 INFO spawned: 'instance' with pid 2826
2016-04-29 14:41:38,880 INFO success: instance entered RUNNING state, process has stayed up for > than 30 seconds (startsecs)
2016-04-29 14:43:05,445 INFO exited: instance (terminated by SIGSEGV (core dumped); not expected)
2016-04-29 14:43:06,449 INFO spawned: 'instance' with pid 2848
2016-04-29 14:43:36,495 INFO success: instance entered RUNNING state, process has stayed up for > than 30 seconds (startsecs)

I installed using Buildout and OS dependencies were installed using the following command:

apt install -y build-essential libssl-dev libxml2-dev libxslt1-dev libbz2-dev zlib1g-dev python-setuptools python-dev python-virtualenv libjpeg62-dev libreadline-gplv2-dev python-imaging wv poppler-utils git

I had some problems at the beginning compiling lxml because of memory restrictions.

Any hints?