I've updated snapshot, however there is nothing more interesting I can report yet.
One strange thing I found is that if codeblocks is being run from debuger, which cause it to be a litttle slower - I even have some seconds to play with code completion plugin before codeblocks crashes completely. Some new backtrace I was able to retrieve (don't know if it will help you):
Program received signal SIGABRT, Aborted.
[Switching to Thread -1225189696 (LWP 12338)]
0xb765c9e7 in raise () from /lib/tls/libc.so.6
(gdb) bt
#0 0xb765c9e7 in raise () from /lib/tls/libc.so.6
#1 0xb765e31b in abort () from /lib/tls/libc.so.6
#2 0xb7693365 in __fsetlocking () from /lib/tls/libc.so.6
#3 0xb769950c in malloc_usable_size () from /lib/tls/libc.so.6
#4 0xb769a5ab in free () from /lib/tls/libc.so.6
#5 0xb769bc4c in malloc () from /lib/tls/libc.so.6
#6 0xb765ed1f in qsort () from /lib/tls/libc.so.6
#7 0xb7d3fd57 in wxBaseArrayPtrVoid::Sort () from /usr/lib/libwx_gtk2-2.4.so
#8 0xb6a90753 in TokensArray::Sort () from /home/ruslan/workspace/codeblocks/src/output/share/CodeBlocks/plugins/libcodecompletion.so
#9 0xb6a8d1b3 in Parser::SortAllTokens () from /home/ruslan/workspace/codeblocks/src/output/share/CodeBlocks/plugins/libcodecompletion.so
#10 0xb6a88295 in NativeParser::MarkItemsByAI () from /home/ruslan/workspace/codeblocks/src/output/share/CodeBlocks/plugins/libcodecompletion.so
#11 0xb6a7f5ce in CodeCompletion::CodeComplete () from /home/ruslan/workspace/codeblocks/src/output/share/CodeBlocks/plugins/libcodecompletion.so
#12 0xb6a8041c in CodeCompletion::DoCodeComplete () from /home/ruslan/workspace/codeblocks/src/output/share/CodeBlocks/plugins/libcodecompletion.so
#13 0xb6a80b78 in CodeCompletion::OnCodeComplete () from /home/ruslan/workspace/codeblocks/src/output/share/CodeBlocks/plugins/libcodecompletion.so
#14 0xb7d46f05 in wxEvtHandler::SearchEventTable () from /usr/lib/libwx_gtk2-2.4.so
#15 0xb7d46cfc in wxEvtHandler::ProcessEvent () from /usr/lib/libwx_gtk2-2.4.so
#16 0xb7a88844 in PluginManager::NotifyPlugins () from /home/ruslan/workspace/codeblocks/src/output/libcodeblocks.so
#17 0xb7a1a658 in cbEditor::NotifyPlugins () from /home/ruslan/workspace/codeblocks/src/output/libcodeblocks.so
#18 0xb7a1d048 in cbEditor::DoAskForCodeCompletion () from /home/ruslan/workspace/codeblocks/src/output/libcodeblocks.so
#19 0xb7a21f0c in cbEditor::OnTimer () from /home/ruslan/workspace/codeblocks/src/output/libcodeblocks.so
#20 0xb7d46f05 in wxEvtHandler::SearchEventTable () from /usr/lib/libwx_gtk2-2.4.so
#21 0xb7d46cfc in wxEvtHandler::ProcessEvent () from /usr/lib/libwx_gtk2-2.4.so
#22 0xb7dc5075 in wxTimerBase::Notify () from /usr/lib/libwx_gtk2-2.4.so
#23 0xb7d07654 in timeout_callback () from /usr/lib/libwx_gtk2-2.4.so
#24 0xb71b67d4 in g_main_context_wakeup () from /usr/lib/libglib-2.0.so.0
#25 0xb71b4a21 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#26 0xb71b7c77 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#27 0xb71b81c8 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#28 0xb7486849 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#29 0xb7cc0896 in wxApp::MainLoop () from /usr/lib/libwx_gtk2-2.4.so
#30 0xb7d14ecf in wxAppBase::OnRun () from /usr/lib/libwx_gtk2-2.4.so
#31 0xb7cc1240 in wxEntry () from /usr/lib/libwx_gtk2-2.4.so
#32 0x08057c32 in ?? ()
#33 0xb7647ec0 in __libc_start_main () from /lib/tls/libc.so.6
#34 0x08057af1 in ?? ()