@jens: the latest nightly build from your repository on my Debian jessie 64-bit crashed a few seconds after i closed it and upon reopen the crash got reproduced.
user@debian:~$ gdb codeblocks
GNU gdb (GDB) 7.6.2 (Debian 7.6.2-1)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
(gdb) bt
#0 0x00007ffff27589f8 in main_arena () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007ffff61fea44 in wxAppBase::SendIdleEvents(wxWindow*, wxIdleEvent&) ()
from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0
#2 0x00007ffff61fee74 in wxAppBase::ProcessIdle() ()
from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0
#3 0x00007ffff6179e91 in ?? ()
from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0
#4 0x00007ffff33e4ce5 in g_main_context_dispatch ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007ffff33e5048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6 0x00007ffff33e530a in g_main_loop_run ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7 0x00007ffff52f9147 in gtk_main ()
from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#8 0x00007ffff618d36a in wxEventLoop::Run() ()
from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0
#9 0x00007ffff61fec1c in wxAppBase::MainLoop() ()
from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0
#10 0x00000000004484fb in CodeBlocksApp::OnRun (this=0x7d3bb0) at app.cpp:818
#11 0x00007ffff589df7d in wxEntry(int&, wchar_t**) ()
from /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0
#12 0x000000000043b962 in main (argc=3, argv=<optimized out>) at app.cpp:278
(gdb) continue
Continuing.
Program received signal SIGABRT, Aborted.
0x00007ffff23ea3a9 in __GI_raise (sig=sig@entry=6)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) continue
Continuing.
[Thread 0x7fffd7dc1700 (LWP 12975) exited]
[Thread 0x7fffd85c2700 (LWP 12946) exited]
[Thread 0x7fffe7309700 (LWP 12939) exited]
[Thread 0x7fffe7b0a700 (LWP 12938) exited]
[Thread 0x7fffe830b700 (LWP 12937) exited]
Program terminated with signal SIGABRT, Aborted.
The program no longer exists.
(gdb) continue
The program is not being run.
(gdb) q
user@debian:~$