in reply to Re^2: help with "symbol lookup error" message
in thread help with "symbol lookup error" message

So List::Util is in there on my platform right enough

Aaah ... cool.
AFAICS, this absurd dependency is not present in perl-5.36.0 - on both Windows and freebsd-12.0.
On Windows (perl-5.36.0), your script outputs: 
Loading File/Copy.pm
Loading builtin.pm
Loading overload.pm
Loading overloading.pm
Loading warnings/register.pm
Loading File/Spec.pm
Loading File/Spec/Win32.pm
Loading Cwd.pm
Loading Exporter.pm
Loading XSLoader.pm
Loading File/Spec/Unix.pm
Loading constant.pm
Loading Config.pm
Loading Time/HiRes.pm
Loading Carp.pm

[download]
On freebsd (5.36.0), it's exactly the same - except that Carp.pm and File/Spec/Win32.pm are not loaded, and Exporter/Heavy.pm is loaded.

I'm sure there's a module for this but I can neither remember nor find it just now

I reckon the code you posted is much clearer for not having loaded that module (whatever it is ;-)

Cheers,
Rob

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Re^4: help with "symbol lookup error" message
by hippo (Archbishop) on Jan 27, 2023 at 12:39 UTC

    Thanks for providing your list. I've dug a little further and for me the chain to List::Util appears to be just File::Copy -> Scalar::Util -> List::Util with File::Copy having this line:

    my $Scalar_Util_loaded = eval q{ require Scalar::Util; require overloa
+d; 1 };

    [download]

    This explains why I'm seeing it but not why it is absent in your case. I'll leave that part to you. :-)

    🦛

[reply]
[d/l]
[select]
      This explains why I'm seeing it but not why it is absent in your case. I'll leave that part to you. :-)

      Heh ... yeah, fair enough ;-)
      AFAICT it's pretty simple. By the time perl-5.36.0 comes along, Sawyer has removed the Scalar::Util requirement from File/Copy.pm.

      Frid'y night (alcohol-fuelled) aside: Given the ease with which perl can be built & installed, and that perl-5.38.0 is only a few months away, I'm surprised that serious perl-users are still running perl-5.34.x.
      I see it as being symptomatic of the mentality expressed poignantly by Frank Zappa in "A Token of My Extreme" (Joe's Garage): 
      Some people think that if they go too far, they'll never get back to w
+here the rest of them are.

      [download]
      Cheers,
      Rob
[reply]
[d/l]
        Given the ease with which perl can be built & installed

        Built, yes. Installed, yes. Tested against all code using that version in production, not so much. I'm very happy to stick with 5.34.0 for the stability. A couple of years ago (ie. 2 major migrations back) it was 5.16 so these are halcyon days indeed.

        All that said, I feel a poll coming on ...

        Update: there it is.

        🦛

[reply]

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