audacity
Fatal Error: Mismatch between the program and library build versions detected.
The library used 3.0 (wchar_t,compiler with C++ ABI 1014,wx containers,compatible with 2.8),
and your program used 3.0 (wchar_t,compiler with C++ ABI 1013,wx containers,compatible with 2.8).
Aborted (core dumped)

Fixed rebuild is up (needed a rebuild on new toolchain/wxgtk build on that toolchain)

sudo pacman -U http://kaosx.tk/repo/build/audacity-2.4.2-3-x86_64.pkg.tar.zst

once confirmed as working good again, it will move to all users (app repo).