(gdb) bt
#0  0x007cc2f9 in free () from /lib/tls/libc.so.6
#1  0x08059038 in ast_frfree (fr=0x890ff4) at frame.c:281
#2  0x08061b65 in ast_channel_spy_free (spy=0xb79f8910) at channel.c:1111
#3  0x00278693 in channel_spy (chan=0x9ecf478, spyee=0x9e88600, volfactor=0xb79f8a74, fd=0) at app_chanspy.c:341
#4  0x0027975d in chanspy_exec (chan=0x9ecf478, data=0xb79fd0a0) at app_chanspy.c:508
#5  0x0809141d in pbx_extension_helper (c=0x9ecf478, con=Variable "con" is not available.
) at pbx.c:553
#6  0x080926e6 in __ast_pbx_run (c=0x9ecf478) at pbx.c:2230
#7  0x0809424c in pbx_thread (data=0x892824) at pbx.c:2517
#8  0x00931371 in start_thread () from /lib/tls/libpthread.so.0
#9  0x00831ffe in clone () from /lib/tls/libc.so.6



(gdb) bt full
#0  0x007cc2f9 in free () from /lib/tls/libc.so.6
No symbol table info available.
#1  0x08059038 in ast_frfree (fr=0x890ff4) at frame.c:281
No locals.
#2  0x08061b65 in ast_channel_spy_free (spy=0xb79f8910) at channel.c:1111
        f = Variable "f" is not available.