mac login terminal error

http://meridianid.herobo.com/terminal_error.pn开发者_如何学Gog

the first thing it does when i try to log in is display this error. on every window. can someone please help and find what 'login' is on line 400 or just know what the answer is? greatly appreciated.

cannot access terminal to debug myself :(

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A bit of searching seems to suggest deleting /usr/bin/login remedies a similar error. However I would not blindly go deleting stuff. You could also try to use the repair permissions function of the Disk Utility, its solved many a strange problem before