.
Thread 4 (process 20259):
#0  0xf7a93707 in ?? ()
#1  0xf5980e38 in ?? ()
#2  0xf7b20fd3 in ?? ()
#3  0x0818a2a0 in ?? ()
#4  0x080d4100 in ?? ()
#5  0x080cd9e8 in ?? ()
#6  0x00000001 in ?? ()
#7  0x003f003f in ?? ()
#8  0x003f003f in ?? ()
#9  0x003f003f in ?? ()
#10 0xf7abeed1 in ?? ()
#11 0x08181bd0 in ?? ()
#12 0xf7b46a2a in ?? ()
#13 0xf781b811 in _int_malloc () from /lib32/libc.so.6
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 3 (process 20260):
#0  0xffffe405 in __kernel_vsyscall ()
#1  0xf7913f15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib32/libpthread.so.0
#2  0xf6c44728 in ?? ()
#3  0xf5b2010c in ?? ()
#4  0xf5b2013c in ?? ()
#5  0x00000000 in ?? ()
.
Thread 2 (process 20261):
#0  0xffffe405 in __kernel_vsyscall ()
#1  0xf7916175 in sem_wait@@GLIBC_2.1 () from /lib32/libpthread.so.0
#2  0xf6c4e8d8 in ?? ()
#3  0xf5b22d70 in ?? ()
#4  0x00000000 in ?? ()
.
Thread 1 (process 20246):
#0  0xf7ab3310 in ?? ()
#1  0xfff0d528 in ?? ()
#2  0xf781ef70 in free () from /lib32/libc.so.6
#3  0xf7ab8973 in ?? ()
#4  0x0000000c in ?? ()
#5  0x0000005b in ?? ()
#6  0xfff0d5a8 in ?? ()
#7  0xf7ab8a05 in ?? ()
#8  0x0000005d in ?? ()
#9  0xf3d63090 in ?? ()
#10 0xfff0d5a8 in ?? ()
#11 0xf7ab8801 in ?? ()
#12 0x08121910 in ?? ()
#13 0xffffffff in ?? ()
#14 0xf7ad4c32 in ?? ()
#15 0xf7b0c248 in ?? ()
#16 0x08121910 in ?? ()
#17 0xf3d63090 in ?? ()
#18 0xfff0d638 in ?? ()
#19 0xf7a9fd51 in ?? ()
#20 0xf3d63090 in ?? ()
#21 0xf7ad4c32 in ?? ()
#22 0x0807a3b8 in ?? ()
#23 0x00004f16 in ?? ()
#24 0xf78f9b20 in ?? () from /lib32/libc.so.6
#25 0xf781d6a0 in calloc () from /lib32/libc.so.6
Backtrace stopped: previous frame inner to this frame (corrupt stack?)