I relatively frequently use stuff like 'next'&'last' to simplify loops. This makes code more readable but caused me to hit strange bug(?) in labeling code. Due to some night brain fart I created something like this: 
LOOP:
...
...
...
redo LOOP unles($var)

[download]
Woohaa..., where did it come from?...

Anyhoo... I haven't noticed what I've done, until recently I saw something like this: 'Label not found for "redo LOOP",

After some googling I found some old bug, that causes 'redo' to lost track of blocks if 'goto' is used. I don't use 'goto', but I figured that there may be some esoteric connection between my problem and bug #19061, and replaced 'redo' with 'goto', and the problem vanished.

So, the question would be - what's the difference between 'redo' and 'goto'?

And how would one go about hunting such bugs? Should one care at all? After all, I don't need such construct at all.

Title editted by tye to make it more than one word

In reply to What's the difference between 'redo' and 'goto'? by Eyck

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.