Installation to "invalid" path is possible but uninstall does not work

I had a typo when I wanted to install on Windows (Target path was: C:i\Qt5 (note the extra i there)) The installer did not complain about that and installed to <directoryWhereInstallerIs>\i\Qt5 and uninstallation fails afterwards. The installer should either do not allow these installations or have the correct path saved for uninstallation.