/usr/bin/i586-mingw32msvc-as is in mingw32-binutils 2.20-0.2ubuntu1.
This file is owned by root:root, with mode 0o755.
It is a symlink to /usr/bin/./usr/i586-mingw32msvc/bin/as
/usr/bin/./usr/i586-mingw32msvc/bin/as