I tried to compile and use C::B svn 14050 with the new official wxWidgets 3.3.4.
Compilation/linking is OK with Msys2 distribution. C::B can be opened, but when I try to open a .cbp file, I obtain a wxDebug alert in ../../src/aui/auibook.cpp, line 2815. page_idx < m_tabs.GetPageCount() failed in GetPage().
This happens 3 times when I open my cbp if I click on the Continue button. Then C::B seems to work as expected. When I close C::B, I have again 3 times de wxAlert.
I can confirm that I got the same issue. I'm using the github action to build the package, and I see the msys2/ucrt64 has now shipped with wx 3.3.4.
See here:
https://github.com/asmwarrior/x86-codeblocks-builds/releases/tag/r14050-2026-10-13-04-41-22