I can duplicate your results on Perl 5.16.3.

What do you expect your output to be? I expect to get the following warning when dow=7 since you don't set workday to a defined value: 

Use of uninitialized value $workday in concatenation (.) or string

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Tip #6 from the Basic debugging checklist: B::Deparse, but it doesn't reveal much.

Interesting to change 8 to 9: 

while ($dow < 9) {

...

2 0
3 0
4 0
5 0
6 1
7 1
8 0

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In reply to Re: Paranormal leakage of previous value from conditionally set lexical variable by toolic
in thread Paranormal leakage of previous value from conditionally set lexical variable by Anonymous Monk

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