I often create function (method) stubs along the lines of: 
sub my_method { shift->{some_parm} }

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Sometimes, the function, takes more parameters. Recently I made the mistake of doing something like this: 
sub my_method { shift->{shift} }

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The idea was to use the second parameter as a key to the hash ref in the first parameter. But instead I got the literal 'shift' as a key. The code should have been: 
sub my_method { shift->{shift()} }

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Took me a while to find that one and no amount of staring at it made it any easier to find.

In reply to Re: I need a "non-trivial" bug for my script! by ruzam
in thread I need a "non-trivial" bug for my script! by Antigone

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