The exact steps to reproduce the problem are:
pre condition:
SpellChecker not configured at all (so, it only have default configuration: the 3 path which search in "/usr/share/codeblocks/SpellChecker", the checkbox "Enable online spell checker" is not set and Dictionnary is just empty)
Steps:
Configure Dictionary and Thesauri path to be able to select something in Dictionary, but 
do not select anything.
Validate the configuration.
Result:
Crash because unhandled exception.
About the gdb command... I am sorry, I do not know how to use gdb on command-line (this is one of multiple reasons why C::B save my life very often 

 ), so I am fear that I do not do the right thing...
$gdb codeblocks
GNU gdb (GDB) 7.4-debian
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/codeblocks...Reading symbols from /usr/lib/debug/usr/bin/codeblocks...done.
done.
(gdb) break main
Breakpoint 1 at 0x441420: file app.cpp, line 262.
(gdb) r
Starting program: /usr/bin/codeblocks 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Breakpoint 1, main (argc=1, argv=0x7fffffffe4b8) at app.cpp:262
262   app.cpp: Aucun fichier ou dossier de ce type.
(gdb) info sharedlibrary 
From                To                  Syms Read   Shared Object Library
0x00007ffff7dddaf0  0x00007ffff7df59d3  Yes (*)     /lib64/ld-linux-x86-64.so.2
0x00007ffff76f4230  0x00007ffff7ac28e8  Yes         /usr/lib/libcodeblocks.so.0
0x00007ffff72cedb0  0x00007ffff733e3d8  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_gtk2u_richtext-2.8.so.0
0x00007ffff7030ac0  0x00007ffff705ee28  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_gtk2u_aui-2.8.so.0
0x00007ffff6da8610  0x00007ffff6de11d8  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_gtk2u_xrc-2.8.so.0
0x00007ffff6b67f00  0x00007ffff6b716d8  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_gtk2u_qa-2.8.so.0
0x00007ffff68f7740  0x00007ffff6932f98  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_gtk2u_html-2.8.so.0
0x00007ffff6635d80  0x00007ffff667f838  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_gtk2u_adv-2.8.so.0
0x00007ffff618cc30  0x00007ffff62dc1a8  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-2.8.so.0
0x00007ffff5db1950  0x00007ffff5db54d8  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_baseu_xml-2.8.so.0
0x00007ffff5b94580  0x00007ffff5ba3678  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_baseu_net-2.8.so.0
0x00007ffff588e3b0  0x00007ffff5920918  Yes (*)     /usr/lib/x86_64-linux-gnu/libwx_baseu-2.8.so.0
0x00007ffff5255b80  0x00007ffff54b66f8  Yes (*)     /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
0x00007ffff4f4df20  0x00007ffff4fa61b8  Yes (*)     /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
0x00007ffff4d16010  0x00007ffff4d220e8  Yes (*)     /usr/lib/x86_64-linux-gnu/libatk-1.0.so.0
0x00007ffff4ae7010  0x00007ffff4b00bc8  Yes (*)     /usr/lib/x86_64-linux-gnu/libpangoft2-1.0.so.0
0x00007ffff48c59e0  0x00007ffff48d79e8  Yes (*)     /usr/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0
0x00007ffff46b83b0  0x00007ffff46bd038  Yes (*)     /usr/lib/x86_64-linux-gnu/libpangocairo-1.0.so.0
0x00007ffff43ce270  0x00007ffff4481af8  Yes (*)     /usr/lib/x86_64-linux-gnu/libcairo.so.2
0x00007ffff40aa1c0  0x00007ffff4161dd8  Yes (*)     /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
0x00007ffff3e3ef30  0x00007ffff3e5d6c8  Yes (*)     /usr/lib/x86_64-linux-gnu/libpango-1.0.so.0
0x00007ffff3b9c8f0  0x00007ffff3c05468  Yes (*)     /usr/lib/x86_64-linux-gnu/libfreetype.so.6
0x00007ffff3960570  0x00007ffff3979bb8  Yes (*)     /usr/lib/x86_64-linux-gnu/libfontconfig.so.1
0x00007ffff3714c30  0x00007ffff3744b68  Yes (*)     /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
0x00007ffff3507260  0x00007ffff3508208  Yes (*)     /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0
0x00007ffff33027c0  0x00007ffff3303c88  Yes (*)     /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0
0x00007ffff30fb190  0x00007ffff30fe4f8  Yes         /lib/x86_64-linux-gnu/librt.so.1
0x00007ffff2e1bf90  0x00007ffff2e8dc58  Yes (*)     /lib/x86_64-linux-gnu/libglib-2.0.so.0
0x00007ffff2beb690  0x00007ffff2bf6c78  Yes         /lib/x86_64-linux-gnu/libpthread.so.0
0x00007ffff29e2de0  0x00007ffff29e38f8  Yes         /lib/x86_64-linux-gnu/libdl.so.2
0x00007ffff273b5b0  0x00007ffff279f7ab  Yes (*)     /usr/lib/x86_64-linux-gnu/libstdc++.so.6
0x00007ffff245cef0  0x00007ffff249c6f8  Yes         /lib/x86_64-linux-gnu/libm.so.6
0x00007ffff2245e70  0x00007ffff22555e8  Yes (*)     /lib/x86_64-linux-gnu/libgcc_s.so.1
0x00007ffff1edab80  0x00007ffff1fef8ec  Yes         /lib/x86_64-linux-gnu/libc.so.6
0x00007ffff1cbaad0  0x00007ffff1cbb558  Yes (*)     /usr/lib/x86_64-linux-gnu/libXinerama.so.1
0x00007ffff1ab4cc0  0x00007ffff1ab8ef8  Yes (*)     /usr/lib/x86_64-linux-gnu/libSM.so.6
0x00007ffff1890050  0x00007ffff18aa4d8  Yes (*)     /lib/x86_64-linux-gnu/libpng12.so.0
---Type <return> to continue, or q <return> to quit---
0x00007ffff1677330  0x00007ffff1684a78  Yes (*)     /usr/lib/x86_64-linux-gnu/libz.so.1
0x00007ffff143fb60  0x00007ffff146bf28  Yes (*)     /usr/lib/x86_64-linux-gnu/libjpeg.so.8
0x00007ffff11de200  0x00007ffff1210768  Yes (*)     /usr/lib/x86_64-linux-gnu/libtiff.so.4
0x00007ffff0fafe30  0x00007ffff0fc9c68  Yes (*)     /lib/x86_64-linux-gnu/libexpat.so.1
0x00007ffff0c8cfe0  0x00007ffff0d17268  Yes (*)     /usr/lib/x86_64-linux-gnu/libX11.so.6
0x00007ffff0a6bc00  0x00007ffff0a6c968  Yes (*)     /usr/lib/x86_64-linux-gnu/libXcomposite.so.1
0x00007ffff0869b60  0x00007ffff086a6d8  Yes (*)     /usr/lib/x86_64-linux-gnu/libXdamage.so.1
0x00007ffff0664610  0x00007ffff0667738  Yes (*)     /usr/lib/x86_64-linux-gnu/libXfixes.so.3
0x00007ffff0453a50  0x00007ffff045ef88  Yes (*)     /usr/lib/x86_64-linux-gnu/libXext.so.6
0x00007ffff0247b80  0x00007ffff024e388  Yes (*)     /usr/lib/x86_64-linux-gnu/libXrender.so.1
0x00007ffff00391f0  0x00007ffff0043988  Yes (*)     /usr/lib/x86_64-linux-gnu/libXi.so.6
0x00007fffefe30980  0x00007fffefe35998  Yes (*)     /usr/lib/x86_64-linux-gnu/libXrandr.so.2
0x00007fffefc27c00  0x00007fffefc2c718  Yes (*)     /usr/lib/x86_64-linux-gnu/libXcursor.so.1
0x00007fffef9a70e0  0x00007fffefa12188  Yes (*)     /usr/lib/x86_64-linux-gnu/libpixman-1.so.0
0x00007fffef79bae0  0x00007fffef79c228  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb-shm.so.0
0x00007fffef594950  0x00007fffef597758  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb-render.so.0
0x00007fffef37bb90  0x00007fffef387f08  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb.so.1
0x00007fffef1574f0  0x00007fffef167648  Yes (*)     /lib/x86_64-linux-gnu/libselinux.so.1
0x00007fffeef3e8c0  0x00007fffeef4a978  Yes         /lib/x86_64-linux-gnu/libresolv.so.2
0x00007fffeed2fa30  0x00007fffeed38a58  Yes (*)     /usr/lib/x86_64-linux-gnu/libffi.so.5
0x00007fffeeaf29a0  0x00007fffeeb19158  Yes (*)     /lib/x86_64-linux-gnu/libpcre.so.3
0x00007fffee8db220  0x00007fffee8e8eb8  Yes (*)     /usr/lib/x86_64-linux-gnu/libICE.so.6
0x00007fffee6d2840  0x00007fffee6d3e88  Yes (*)     /lib/x86_64-linux-gnu/libuuid.so.1
0x00007fffee4ced90  0x00007fffee4cfae8  Yes (*)     /usr/lib/x86_64-linux-gnu/libXau.so.6
0x00007fffee2c9090  0x00007fffee2caaa8  Yes (*)     /usr/lib/x86_64-linux-gnu/libXdmcp.so.6
(*): Shared library is missing debugging information.
(gdb) 
Strange, they appear only one here? Maybe because the breakpoint is set on main, before loading of plug-ins? I should put it elsewhere, but?
(And, obviously, plug-ins does not appear...)