I set up to use Data::Printer from the debugger using these instructions. It successfully rebound the debugger's p() command, except that it prints the data twice:

File foo.pl 

#!/usr/bin/env perl
use v5.36;

say "Here is ~/.perldb:\n";
say qx(cat ~/.perldb);

my @xx = (qw/a b c d e/);
push @xx, [ 1,2,3 ];

my $foo = 1; # set breakpoint here and issue p @xx

say 'Show result of p @xx when issued from within program';
use Data::Printer;
p @xx;

[download]
Debug session: 
$ perl -d ./foo.pl

Loading DB routines from perl5db.pl version 1.73
Editor support available.

Enter h or 'h h' for help, or 'man perldebug' for more help.

main::(./foo.pl:4):    say "Here is ~/.perldb:\n";
  DB<1> b 10
  DB<2> c
Here is ~/.perldb:

use DB::Pluggable;
DB::Pluggable->run_with_config( \'[DataPrinter]' );

main::(./foo.pl:10):    my $foo = 1; # use as breakpoint
  DB<2> p @xx
[
    [0] "a",
    [1] "b",
    [2] "c",
    [3] "d",
    [4] "e",
    [5] [
            [0] 1,
            [1] 2,
            [2] 3
        ]
]
[
    [0] "a",
    [1] "b",
    [2] "c",
    [3] "d",
    [4] "e",
    [5] [
            [0] 1,
            [1] 2,
            [2] 3
        ]
]

  DB<3> c
Show result of p @xx when issued from within program
[
    [0] "a",
    [1] "b",
    [2] "c",
    [3] "d",
    [4] "e",
    [5] [
            [0] 1,
            [1] 2,
            [2] 3
        ]
]
Debugged program terminated.  Use q to quit or R to restart,

[download]
(I get the same result when I remove the last 3 lines from foo.pl).

Any idea how to fix this?

In reply to Using Data::Printer from the Perl debugger by ibm1620

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.