...using constants.pm 1.04, I keep hitting this in the else: "Constant name '$name' has unknown problems" , which can only happen if: 
 if ($name =~ /^_?[^\W_0-9]\w*\z/ and !$forbidden{$name}) {

[download]
is false. So, I set a break like this: 
<DBG>b 52 $name !~ /^_?[^\W_0-9]\w*\z/

[download]
and sure enough, it broke there. (My name is simple, DB_ERROR.) That's when things got weird, at the break, I tried: 
<DBG>x $name =~ /^_?[^\W_0-9]\w*\z/
1

[download]
  DB<4> x $name !~ /^_?[^\W_0-9]\w*\z/
0  ''

[download]
..another mystery, how the HECK DID IT break there? I tried: 
<DBG>b 52 ! $name =~ /^_?[^\W_0-9]\w*\z/

[download]
which looks logically the same as <code> $name !~ /^_?^\W_0-9\w*\z/ <code> but, now more weirdness, it no longer breaks there.

My spyder sense tells me this is due to some pragma/debugger weirdness, since I'm breaking in the pragma. But the issue is there is nothing wrong with my use statement, yet it throws that unknown error warning, and I was trying to see why.

Wisdom please?

In reply to strange constants.pm warning by misterperl

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.