media-hub-server crash after recording videos, pulse using high CPU

[Bill Filler]

Using rtm image 184 on krillin

I was testing recording videos with camera-app and noticed that at some point during the recording process that pulseaudio was using 40% CPU and that did not ever get smaller. Then upon closing the camera-app media-hub-server and camera-app crashes. The following is the stacktrace which looks like pulseaudio crashed.

Steps to reproduce:
- open camera-app and record a bunch of videos using both front and back cameras
- run top -d1 during this and you'll see pulseaudio using a lot of cpu
- move camera-app to the background and try to swipe it away and you'll see the crash

apport-retrace --gdb _usr_bin_media-hub-server.32011.crash
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Reading symbols from /usr/bin/media-hub-server...(no debugging symbols found)...done.
warning: core file may not match specified executable file.
[New LWP 12215]
[New LWP 12217]
[New LWP 12222]
[New LWP 12218]
[New LWP 12216]
[New LWP 12219]
[New LWP 12224]
[New LWP 2348]
[New LWP 12232]
[New LWP 12235]
[New LWP 2343]
[New LWP 2342]
[New LWP 12258]
[New LWP 8434]
[New LWP 12239]
[New LWP 12227]
[New LWP 12226]
[New LWP 12231]
[New LWP 12221]
[New LWP 12225]
[New LWP 2269]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
Core was generated by `media-hub-server'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0xb3551cb8 in cleanup_time_events (m=m@entry=0x1965038, force=force@entry=false)
    at pulse/mainloop.c:510
510 pulse/mainloop.c: No such file or directory.
(gdb) bt full
#0 0xb3551cb8 in cleanup_time_events (m=m@entry=0x1965038, force=force@entry=false)
    at pulse/mainloop.c:510
        e = 0x600192d3
        n = <optimized out>
        __func__ = "cleanup_time_events"
        __PRETTY_FUNCTION__ = "cleanup_time_events"
#1 0xb3552a8e in scan_dead (m=0x1965038) at pulse/mainloop.c:593
No locals.
#2 pa_mainloop_prepare (m=m@entry=0x1965038, timeout=-1) at pulse/mainloop.c:796
        __func__ = "pa_mainloop_prepare"
        __PRETTY_FUNCTION__ = "pa_mainloop_prepare"
#3 0xb3553232 in pa_mainloop_iterate (m=0x1965038, block=<optimized out>, retval=0x0)
    at pulse/mainloop.c:929
        r = <optimized out>
#4 0xb35532c0 in pa_mainloop_run (m=0x1965038, retval=retval@entry=0x0) at pulse/mainloop.c:950
        r = <optimized out>
#5 0xb355d3b2 in thread (userdata=0x19630d8) at pulse/thread-mainloop.c:88
        m = 0x19630d8
        mask = {__val = {2147483647, 4294967294, 4294967295 <repeats 30 times>}}
#6 0xb35080cc in internal_thread_func (userdata=0x1965140) at pulsecore/thread-posix.c:83
        t = 0x1965140
#7 0xb6a8ff98 in start_thread (arg=0xa50fd3e0) at pthread_create.c:311
        pd = 0xa50fd3e0
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1525688840, -1525689376, 0, -1525690912,
                -1525690592, -1525688812, 0, -1096024600, 1931098388, 1623001989,
                0 <repeats 54 times>}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0},
            data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8 0xb6a2f22c in ?? () at ../ports/sysdeps/unix/sysv/linux/arm/nptl/../clone.S:92
   from /lib/arm-linux-gnueabihf/libc.so.6
No locals.
---Type <return> to continue, or q <return> to quit---
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)