.
Thread 3 (process 20774):
#0  0xffffe405 in __kernel_vsyscall ()
#1  0xf78aff15 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib32/libpthread.so.0
#2  0xf6bdfff8 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#3  0xf6cda438 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#4  0xf6be034d in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#5  0xf78ab4fb in start_thread () from /lib32/libpthread.so.0
#6  0xf782508e in clone () from /lib32/libc.so.6
.
Thread 2 (process 20775):
#0  0xffffe405 in __kernel_vsyscall ()
#1  0xf78b2175 in sem_wait@@GLIBC_2.1 () from /lib32/libpthread.so.0
#2  0xf6bea1a8 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#3  0xf78ab4fb in start_thread () from /lib32/libpthread.so.0
#4  0xf782508e in clone () from /lib32/libc.so.6
.
Thread 1 (process 20757):
#0  0xf78ad540 in pthread_mutex_lock () from /lib32/libpthread.so.0
#1  0xf6cd8168 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#2  0xf5ab9024 in ?? ()
#3  0xf722bde8 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#4  0xffb765c8 in ?? ()
#5  0xf722bde8 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#6  0xf726c4a0 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#7  0x0000003e in ?? ()
#8  0xffb765f8 in ?? ()
#9  0xf6d2f582 in ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)