did i find a unix bug?

scenario: a directory foo containing two files called bar and bar.tmp.

now issue mv foo/bar* (yes, there's no second argument.)

result: the contents of bar.tmp will be overwritten with those of bar (ie. bar will be renamed to bar.tmp).

you can witness the process in verbose mode: user@host: mv -v foo/bar* /path/to/foo/bar' -> /path/to/foo/bar.tmp' i think that's quite unnerving.