I think you should just remove the % in

  return map $_->{'value'}, @{%$hash}{@_};
                              ^
[download]

Starting with 5.10, Perl changed (fixed) the way this hash-slice construct is interpreted, which would explain why it did work before upgrading...

(As there's no test for xget in the package, presumably no one has come across the issue yet.)

#!/usr/local/bin/perl -w
use strict;

sub xget {
  my $hash = shift;
  return map $_->{'value'}, @{%$hash}{@_};
}

my $hash = {
    foo => { value => "FOO" },
    bar => { value => "BAR" },
};

print "$_\n" for xget($hash, qw(foo bar) );
[download]

$ ./1024343.pl
Can't use string ("2/8") as a HASH ref while "strict refs" in use at .
+/1024343.pl line 9.
[download]

Fixed:

#!/usr/local/bin/perl -w
use strict;

sub xget {
  my $hash = shift;
  return map $_->{'value'}, @$hash{@_};
}

my $hash = {
    foo => { value => "FOO" },
    bar => { value => "BAR" },
};

print "$_\n" for xget($hash, qw(foo bar) );
[download]

$ ./1024343.pl
FOO
BAR
[download]

Appreciate, Got to check out why / how hash-slice construct being interpreted.

Please check out the discussion in the Hash statement problem. thread. The basic problem is still that the  %$hash_reference syntax (and I think also the  @$array_reference syntax) simply doesn't work (Update: within a hash/array slice expression as shown in the OP – thanks, choroba) from version 5.10.x (where x == 0, I think) onward.

Wherever you find if, you will have to change this syntax as has been noted elsewhere in this and the previous thread – or else get the maintainer(s) of the module(s) in question to change it, which is probably more trouble than just changing it yourself!

%$hash_ref and @$array_ref still work. It is @{%$hash_ref}{1,2} which does not work anymore, as it never should have worked. %$hash_ref is evaluated to a string like "1/8" which tells you how the hash uses its buckets. Then, @{"1/8"}{1,2} tries to interpret the string as a hash reference and fails. Without strict refs, you can create a hash called "1/8": ${"1/8"}{1} = "q"; print @{"1/8"}{1};
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

How are you calling xget in your code?

I've checked out the latest version, but it seems problem still occurs. No change upon the xget function, Here is the link to the XML-Bare github

Click Here for XML-Bare

The version on github is the same as on cpan. The question asked of you "How are you calling xget in your code?", the answer to which may help investigations.