reproduced problem:
$ PULSE_SERVER=localhost:4716 ALSA_PCM_NAME=pulse padsp vlc /dev/cdrom >>/tmp/vlc.$$.ort 2>&1 Segmentation fault (core dumped)
$ vlc /dev/cdrom >>/tmp/vlc.$$.ort 2>&1 [no problem without padsp]
pulseaudio-utils 1:4.0-0ubuntu6 vlc-nox 2.0.8-1
reproduced problem:
$ PULSE_SERVER= localhost: 4716 ALSA_PCM_NAME=pulse padsp vlc /dev/cdrom >>/tmp/vlc.$$.ort 2>&1
Segmentation fault (core dumped)
$ vlc /dev/cdrom >>/tmp/vlc.$$.ort 2>&1
[no problem without padsp]
pulseaudio-utils 1:4.0-0ubuntu6
vlc-nox 2.0.8-1