Comment # 9 on bug 1199425 from Freek de Kruijf

I used gdb till just before it went stuck. Below is the backtrace:
(gdb) bt
#0  __libc_connect (fd=3, addr=..., len=10) at
../sysdeps/unix/sysv/linux/connect.c:24
#1  0x0004cb4c in bthConnect (btAddr=0xbeffedc8 "00:80:25:2C:C5:C7",
loc_btAddr=0xbeffedda "") at Bluetooth.cpp:347
#2  0x00025ae8 in Inverter::logOn (this=this@entry=0xbeffed74) at
Inverter.cpp:612
#3  0x000264e4 in Inverter::process (this=this@entry=0xbeffed74) at
Inverter.cpp:59
#4  0x00016784 in main (argc=<optimized out>, argv=<optimized out>) at
main.cpp:104

One step further:

(gdb) bt
#0  __libc_connect (fd=3, addr=..., len=10) at
../sysdeps/unix/sysv/linux/connect.c:26
#1  0x0004cb4c in bthConnect (btAddr=0xbeffedc8 "00:80:25:2C:C5:C7",
loc_btAddr=0xbeffedda "") at Bluetooth.cpp:347
#2  0x00025ae8 in Inverter::logOn (this=this@entry=0xbeffed74) at
Inverter.cpp:612
#3  0x000264e4 in Inverter::process (this=this@entry=0xbeffed74) at
Inverter.cpp:59
#4  0x00016784 in main (argc=<optimized out>, argv=<optimized out>) at
main.cpp:104

One step further it gets stuck.