the core° pragma experimental says

The supported features, documented further below, are:


    array_base    - allow the use of $[ to change the starting index of @array
    autoderef     - allow push, each, keys, and other built-ins on references
    lexical_topic - allow the use of lexical $_ via "my $_"

Though running the following code under 5.24 doesn't show any effect

use strict;
use warnings;
use experimental 'autoderef';

BEGIN {
   warn "@INC\n";
   warn "$]\n";
}


my $a=[];

push $a,1,2,3;

warn "@$a";
[download]

out

c:/Perl_524/bin/\perl.exe  d:/Users/RolfLangsdorf/AppData/Roaming/pm/e
+xperimental_autoderef.pl 
c:/Perl_524/site/lib c:/Perl_524/lib .
5.024001
Experimental push on scalar is now forbidden at d:/Users/RolfLangsdorf
+/AppData/Roaming/pm/experimental_autoderef.pl line 13, near "3;"
Execution of d:/Users/RolfLangsdorf/AppData/Roaming/pm/experimental_au
+toderef.pl aborted due to compilation errors.
[download]

I suppose this is a bug, though I'm wondering was there ever a useful application for

use experimental 'autoderef'; ?

AFAIK autoderef never needed to be activated.

°) strange

~/pm $ corelist experimental

Data for ????-??-??
experimental was first released with perl v5.19.11
[download]

but perldoc.perl.org doesn't list experimental

update

I know that auto deref was deprecated, but the mention in experimental doesn't make sense, because

• it was a normal builtin, not an experimental feature
• it pretends to allow activation despite deprecation
• perldoc.Perl.org doesn't list a core pragma

That's very confusing

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