pulseaudio assertions failing with pygame

[Yoan]

I've noticed regular -but hard to reproduce- pulseaudio bugs when using the pygame module for python 2.7.

1) Assertion 't = find_next_time_event( m )' failed at pulse/mainloop.c:721, function calc_next_timeout() . Aborting .

2) Assertion 'e->mainloop->n_enabled_defer_events > 0' failed at pulse/mainloop.c:260, function mainloop_defer_enable(). Aborting. [I've currently a gdb paused after SIGABRT on this assertion, if I can provide a trace or something useful tell me before I reboot...]

3) At some point during execution of a python script some thread suddenly starts using 100% of CPU, sounds (if any) stop playing while everything else continues working. Since I don't manage to catch an obvious CPU burner with python's profiler (cProfile) I assume it comes from a C extension. I've identified the faulty thread with gdb and top -H:
 Thread 0x7fffe1507700 (LWP 19065) "python" 0x00007ffff59e8466 in pa_mainloop_prepare () from /usr/lib/x86_64-linux-gnu/libpulse.so.0

btw, assertion 1) happens very often but 2) just once (20 minutes ago) after I've updated pygame to a later version and compiled it with symbols to debug these with gdb.

pygame.__version__ = '1.9.1release'
python --version Python 2.7.6
pulseaudio --version = pulseaudio 4.0
uname -a = Linux e6410 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
cat /etc/issue = Linux Mint 17 Qiana