Cool, ... but ...
I tried to compile wxWidgets 3.1.4 (git) : OK
I tried to compile C::B, svn 11979 with this wxWidgets 3.1.4 (git) : OK
I tried to compile one of my own programs, also using this wxWidgets 3.1.4 (git) : OK
In each case, executable is bigger tha previously, but it's normal because this gcc version has more statically linked parts.
But I had a crash in C::B itself when working on a project :
To obtain this crash :
In my workspace menu, "Properties...", and in the "Build Target" tab, I choosed one of the Build targets, clicked on the "Duplicate" button, accepted the name "copy of ..." and simply clicked on the OK button of the "Project/target options" window without changing anything. C::B crashes but no RPT file was created.
No such problem with gcc 9.2 found in msys2 nor with gcc 8.1.
Sorry
