The problem is that Term::ReadLine is suffering from bit rot.  Try installing 
Term::ReadLine::Gnu.

> On Apr 13, 2018, at 3:14 PM, William Schmidt <t.william.schm...@gmail.com> 
> wrote:
> 
> Hello piddlers,
> 
> perldl is one great prototyping tool, and I am making great progress 
> understanding and mastering PDL running it in macOS, but thus far, enabling 
> history list and command line editing inside perldl has been a total bust. 
> The docos say the command line editor is emacs-like. I would prefer vi but 
> any command line editing is welcome, given how I am using perldl to learn 
> PDL. However, I cannot enable the history list nor edit a previous line other 
> than doing very precise cut and paste. Here is the initial announcement when 
> I start perldl:
> 
> $ perldl
> perlDL shell v1.357
>  PDL comes with ABSOLUTELY NO WARRANTY. For details, see the file
>  'COPYING' in the PDL distribution. This is free software and you
>  are welcome to redistribute it under certain conditions, see
>  the same file for details.
> ReadLines, NiceSlice, MultiLines  enabled
> Reading /Users/carly/.perldlrc...
> Found docs database 
> /Users/carly/perl5/perlbrew/perls/perl-5.20.3/lib/site_perl/5.20.3/darwin-2level/PDL/pdldoc.db
> Type 'help' for online help
> Type 'demo' for online demos
> Loaded PDL v2.018 (supports bad values)
> 
> 
> Notice, ReadLines is enabled.
> 
> And here is what I get with the l command, 'l', not '1';
> 
> Can't locate object method "GetHistory" via package "Term::ReadLine::Stub" at 
> /Users/carly/perl5/perlbrew/perls/perl-5.20.3/bin/perldl line 313, <STDIN> 
> line 2.
> 
> What am I missing? What Perl/PDL modules must be present? Getting history and 
> command editing working would truly make perldl an effective learning tool.
> 
> Thanks and regards,
> Will Schmidt
> 
> 
> 
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