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merlyn mentioned what I believe to be a similar bug, while writing the code to one of his most recent articles. I don't think the article explaining this code is online yet, but it relates to traversing a file system.
To see the bug in action, save the code to something like tiefinder.pl. Uncomment the 'DEBUG: fetching' line and invoke something like ./tiefinder.pl /tmp You should notice the DEBUG line getting printed twice as often as you might expect. I don't have an answer for you (and at the time, neither did merlyn) but perhaps this can help you zero in on the problem. -Blake In reply to Re: warning: tied vars may evaluate twice in logical expressions
by blakem
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