Crash on Linux when USB sound card set as the first sound card (thanks Sergei Petrov)

[bennylp]

Quoting ​http://pjsip.org/pipermail/pjsip/2007-February/002312.html:

My problem is the following, i've got two sound cards, one built-in
intel8x0, and the other one generic usb-audio. pjsua works fine when
i've got both cards active and the built-in one is the first card in
ALSA. When I make the USB card the first one, the pjsua segfaults with
a message:

12:49:56.491 os_core_unix.c Info: possibly re-registering existing thread

Other sound apps work fine in both configurations.

Thanks Sergei Petrov for reporting.

See also ticket #141 for the stable branch.

[bennylp]

Sergei Petrov wrote:

I've found out that the problem is in portaudio. In function
static void Copy_16_To_16 ()
in the pa_converters.c file the dest buffer happens to be NULL
somehow, I've made a quick fix that works for me like
if (dest == NULL) return;

Fixed in r1012.