When disabling my wireless network device it does work:

(gdb) set args --no-daemon --enable-test-devices
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /usr/sbin/NetworkManager --no-daemon --enable-test-devices
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1212074304 (LWP 17293)]
(no debugging symbols found)
NetworkManager: <information>   starting...
NetworkManager: <WARNING>        main (): nm_data_new: Setting up dbus filter
NetworkManager: <information>   eth0: Device is fully-supported using driver 'tg3'.
[New Thread -1212077136 (LWP 17295)]
NetworkManager: <information>   nm_device_init(): waiting for device's worker thread to start
NetworkManager: <information>   nm_device_init(): device's worker thread started, continuing.
NetworkManager: <information>   Now managing wired Ethernet (802.3) device 'eth0'.
NetworkManager: <information>   eth1: Device is fully-supported using driver 'ipw2200'.
[New Thread -1220469840 (LWP 17296)]
NetworkManager: <information>   nm_device_init(): waiting for device's worker thread to start
NetworkManager: <information>   nm_device_init(): device's worker thread started, continuing.
NetworkManager: <information>   Now managing wireless (802.11) device 'eth1'.
NetworkManager: <information>   Will activate wired connection 'eth0' because it now has a link.
NetworkManager: <information>   Updating allowed wireless network lists.
NetworkManager: <WARNING>        nm_dbus_get_networks_cb (): nm-dbus-nmi.c:522 (nm_dbus_get_networks_cb): error received: org.freedesktop.NetworkManagerInfo.NoNetworks - There are no wireless networks stored..
NetworkManager: <information>   SWITCH: no current connection, found better connection 'eth0'.
NetworkManager: <information>   Will activate connection 'eth0'.
NetworkManager: <information>   Device eth0 activation scheduled...
NetworkManager: <information>   Activation (eth0) started...
NetworkManager: <information>   Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
NetworkManager: <information>   Old device 'eth0' activating, won't change.
NetworkManager: <information>   Activation (eth0) Stage 1 of 5 (Device Prepare) started...
NetworkManager: <information>   Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
NetworkManager: <information>   Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
NetworkManager: <information>   Activation (eth0) Stage 2 of 5 (Device Configure) starting...
NetworkManager: <information>   Activation (eth0) Stage 2 of 5 (Device Configure) successful.
NetworkManager: <information>   Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
NetworkManager: <information>   Activation (eth0) Stage 2 of 5 (Device Configure) complete.
NetworkManager: <information>   Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
NetworkManager: <information>   DHCP daemon state is now 14 (normal exit) for interface eth0
NetworkManager: <information>   DHCP daemon state is now 11 (unknown) for interface eth0
NetworkManager: <information>   DHCP daemon state is now 14 (normal exit) for interface eth0
NetworkManager: <information>   Activation (eth0) Beginning DHCP transaction.
NetworkManager: <information>   Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
NetworkManager: <information>   DHCP daemon state is now 12 (successfully started) for interface eth0
NetworkManager: <information>   DHCP daemon state is now 1 (starting) for interface eth0
NetworkManager: <information>   DHCP daemon state is now 2 (bound) for interface eth0
NetworkManager: <information>   Activation (eth0) Stage 4 of 5 (IP Configure Get) scheduled...
NetworkManager: <information>   Activation (eth0) Stage 4 of 5 (IP Configure Get) started...
NetworkManager: <information>   Retrieved the following IP4 configuration from the DHCP daemon:
NetworkManager: <information>     address 192.168.2.52
NetworkManager: <information>     netmask 255.255.255.0
NetworkManager: <information>     broadcast 192.168.2.255
NetworkManager: <information>     gateway 192.168.2.214
NetworkManager: <information>     nameserver 192.168.1.209
NetworkManager: <information>     hostname 'lort'
NetworkManager: <information>     domain name 'newtec.be'
NetworkManager: <information>   Activation (eth0) Stage 5 of 5 (IP Configure Commit) scheduled...
NetworkManager: <information>   Activation (eth0) Stage 4 of 5 (IP Configure Get) complete.
NetworkManager: <information>   Activation (eth0) Stage 5 of 5 (IP Configure Commit) started...
NetworkManager: <information>   DHCP returned name servers but system has disabled dynamic modification!
NetworkManager: <information>   Activation (eth0) successful, device activated.
NetworkManager: <information>   Activation (eth0) Finish handler scheduled.
NetworkManager: <information>   Activation (eth0) Stage 5 of 5 (IP Configure Commit) complete.