Comment 4 for bug 1175933

This is not a bug. The name is quite valid, it just trips up the normal win32 subsystem parsing. You can create or delete such a file name within windows using the posix subsystem. You run into similar problems with files named after the old reserved DOS devices, such as NUL and AUX. Just one of those silly little choices Microsoft made over the years.

If you wish, you can mount the filesystem with the windows_names mount option to prevent yourself from doing such things.