That adds information, but I still don't see the bug. The output is

Use of uninitialized value $previoustime in subtraction (-) at soonix.
+pl line 15.
1447773471 at MWE.pl line 22.
before sleeping: time = 1447773471, $time = 1447773471,
after sleeping:  time = 1447773481, $time = 1447773471,
1447773471 at MWE.pl line 22.
1447773481 at MWE.pl line 22.
before sleeping: time = 1447773481, $time = 1447773481,
after sleeping:  time = 1447773491, $time = 1447773481,
1447773481 at MWE.pl line 22.
1447773491 at MWE.pl line 22.
before sleeping: time = 1447773491, $time = 1447773491,
after sleeping:  time = 1447773501, $time = 1447773491,
1447773491 at MWE.pl line 22.
1447773501 at MWE.pl line 22.

[download]

etc. The reason for the second warn each time around is (presumably) because mysleep doesn't get called i.e. because !($time - $previoustime >= 10) i.e. (presumably) because $time - 10 < $previoustime. But that's not the case: after all, we've set $previoustime = $time (which we were just warned is time - 10) and then $time = time. So I still don't get what's going on.

In reply to Re^2: while loop acting up, though I'm not sure how by msh210
in thread while loop acting up, though I'm not sure how by msh210

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.