Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

comment on

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

All of this is on 5.8.3, ActiveState build 809

Yes, the bug is that an error within eval should not affect other evals. I'm not sure where the problem lies, because the following code still works as expected and raises no error, no matter whether $string is a global or a lexical variable:

use strict; use Test::More tests => 12; sub second_eval_unaffected($) { my ($code) = @_; eval $code; diag $@ if $@; my $string = ''; ok eval(q($string="new eval done";)), "Eval after >>$code<< still +works"; is $@, '', "... and raises no error either."; is $string, 'new eval done', "... and sets the variable correctly" +; }; second_eval_unaffected 'my $var_without_accent;'; second_eval_unaffected 'my $var_with = "_accent";'; second_eval_unaffected 'my statement_with_error;'; second_eval_unaffected 'my $var_with__accent";';

This program exhibits the problem as a self-contained Test::More program. The first sequence of steps leads to a failure, while the second run succeeds. This should not happen, but I don't know why :)

use strict; use Test::More tests => 10; sub gauntlet { my $code1=shift; my $string; my $expected = "new eval done"; my $code2='$string="new eval done";'; ok eval($code2), "Good code evals correctly"; is $@, '', "... and raises no error on its own."; diag "Eval trial code\n"; diag $code1; eval $code1; diag '$@ is ', $@; undef $string; diag "Eval good code ($code2)\n"; ok eval $code2; is $@, '', "No error raised"; is $string, $expected; }; gauntlet('my $var_with__accent;'); gauntlet('my $var_without_accent;');

In reply to Re^2: Bug : eval and accent by Corion
in thread Bug : eval and accent by sylvanus_monachus

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, 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
  • 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.
  • 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 scrutinizing the Monastery: (7)
    As of 2021-01-19 10:00 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Notices?