Doesn't the fix include an updated win32calc file? Or does the fix update other files to make the conversion function not crash?
It installs a new version of win32calc.exe.mui file. The win32calc binary itself is unchanged. It seems the bug has something to do with localization
win32calc.exe.mui in KB4516077 and KB4524148 are binary identical. (note: difference between KB4516077 and KB4524148 is only in files windowsdefenderapplicationguard.wim (revision 774 vs 775) and jscript.dll (revision 772 vs 775))