Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

I suspect the root cause of your problem, likely to be seen on Linux/Perl 5.8.0 only, is that the STDOUT file handle is UTF-8 due to your LOCALE settings. I was able to duplicate your problem in that environment. It can be fixed by setting the LANG environment variable, as shown below:

$ perl larry.pl 1 Oh, waitsRndl.evrm $ env|grep LANG LANG=en_US.UTF-8 $ export LANG=en_US.iso885915 $ perl larry.pl 1 Oh, wait, that was Randal...nevermind...

Alternatively, adding the following line:

binmode(STDOUT, ":bytes");

to the top of larry.pl also fixes.

The root cause of this nuisance is described, as follows, in the perl 5.8.1 perldelta.

UTF-8 On Filehandles No Longer Activated By Locale

In Perl 5.8.0 all filehandles, including the standard filehandles, were implicitly set to be in Unicode UTF-8 if the locale settings indicated the use of UTF-8. This feature caused too many problems, so the feature was turned off and redesigned: see Core Enhancements.

UTF-8 no longer default under UTF-8 locales

In Perl 5.8.0 many Unicode features were introduced. One of them was found to be of more nuisance than benefit: the automagic (and silent) ``UTF-8-ification'' of filehandles, including the standard filehandles, if the user's locale settings indicated use of UTF-8.

For example, if you had en_US.UTF-8 as your locale, your STDIN and STDOUT were automatically ``UTF-8'', in other words an implicit binmode(..., ``:utf8'') was made. This meant that trying to print, say, chr(0xff), ended up printing the bytes 0xc3 0xbf. Hardly what you had in mind unless you were aware of this feature of Perl 5.8.0. The problem is that the vast majority of people weren't: for example in RedHat releases 8 and 9 the default locale setting is UTF-8, so all RedHat users got UTF-8 filehandles, whether they wanted it or not. The pain was intensified by the Unicode implementation of Perl 5.8.0 (still) having nasty bugs, especially related to the use of s/// and tr///. (Bugs that have been fixed in 5.8.1)

Therefore a decision was made to backtrack the feature and change it from implicit silent default to explicit conscious option. The new Perl command line option -C and its counterpart environment variable PERL_UNICODE can now be used to control how Perl and Unicode interact at interfaces like I/O and for example the command line arguments. See -C in the perlrun manpage and PERL_UNICODE in the perlrun manpage for more information.


In reply to Re: Code fails on perl 5.8.0 by eyepopslikeamosquito
in thread Larry Witticisms from perl Errors by eyepopslikeamosquito

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others surveying the Monastery: (9)
    As of 2014-09-22 06:24 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (182 votes), past polls