I dug out some old code and tried to run on 5.26.2: 
Unimplemented: POSIX::tmpnam(): use File::Temp instead at POSIX.pm line 185.
Now I have to edit a module? Great! This is apparently why: 
"POSIX.1-2008 marks tmpnam() as obsolete."
"Note: avoid using these functions; use mkstemp(3) or tmpfile(3) instead."
man7.org/linux/man-pages/man3/tmpnam.3.html
My question is why are POSIX, and by extension Perl, breaking our code because *they* made a mistake? Why didn't they fix tmpnam() as if lives depended on not breaking standards? I hope no pacemakers use this C routine. By not making one fix they broke probably vast numbers of programs. I guess someone who knows how could grep github to see the damage.

In reply to Trickle Down Bugs: Who broke our code? by Anonymous Monk

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.