#0 0x00007fd4b78838cf in ?? () from /lib/x86_64-linux-gnu/libc.so.6 (gdb) frame 1 #1 0x0000000000476f69 in ast_bridge_transfer_attended (to_transferee=0x7fd48c287048, to_transfer_target=0x26c4d88) at bridge.c:4591 4591 app = ast_strdupa(ast_channel_appl(chan_unbridged)); (gdb) print ast_channel_appl(chan_unbridged)You can't do that without a process to debug.