I still can't reproduce the crash on Windows. Tested again with revision 12994, official devlibs (libsigc++2-2.2.11) and 12823, experimental GTK3 devlibs (libsigc++2-2.2.10). No crash, no warning.
Note that Crunchbang Waldorf (as well as Debian Wheezy, Jessie and Sid) have libsigc++2-2.2.10.
I still can't reproduce the crash on Windows. Tested again with revision 12994, official devlibs (libsigc++2-2.2.11) and 12823, experimental GTK3 devlibs (libsigc+ +2-2.2. 10). No crash, no warning.
Note that Crunchbang Waldorf (as well as Debian Wheezy, Jessie and Sid) have libsigc++2-2.2.10.