Pulseaudio crashes when an application is setting the input volume

[Steven]

Pulseaudio often crashes when using software like GTalk or Skype, simple playback works fine though.
The interval between the crashes is random, from a couple of minutes to half an hour usually.

My guess is that the problem is related to the fact that these applications change the input volume while talking.
I've been able to reproduce the problem at will by performing a lot of "set source volume" requests to pulseaudio using:

while true; do pactl set-source-volume 2 $((RANDOM % 80000)); done

the crash happens after few seconds.
Attached is the log of produced by running:

pulseaudio -k; sleep 0.5; pulseaudio -vvvvv 2>&1 | tee pulseaudio_output

The crash also occurs when running pulseaudio with "--no-cpu-limit" as option.

I'm using Ubuntu 12.04 amd64 with all the updates installed, but I've got this problem since 11.10.

Other infos:

$ uname -a
Linux ghost 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

$ apt-cache policy pulseaudio
pulseaudio:
  Installed: 1:1.1-0ubuntu15
  Candidate: 1:1.1-0ubuntu15

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test.

[Launchpad Janitor (janitor)]

[Expired for pulseaudio (Ubuntu) because there has been no activity for 60 days.]