/usr/share/icons/hicolor/64x64/mimetypes/application-x-gambas3.png is in gambas3-runtime 3.1.1-2.2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/icons/hicolor/64x64/mimetypes/../../../../gambas3/icons/application-x-gambas3.png