what is *varAlias

A type glob.

Why when I made a little test of this could, I could get it to compile and run but no value was assigned to $reftype.

Do you have references in your package? It works for me:

#!/usr/bin/perl

use warnings;

$main::foo = [];

while ((my $varname, my $globvalue) = each %main::){
    local *varAlias = $globvalue;
    my $reftype = ref $varAlias;
    print "$varname = $reftype\n" if $reftype;
}
 
__END__
Name "main::foo" used only once: possible typo at /tmp/try line 5.
foo = ARRAY
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Note that looping over the entries in a stash will not find any lexical variables.

Would not compile with strict in use.

That's because you never introduced $varAlias. Either use:

    our $varAlias = $globvalue;
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or

    use vars qw /*varAlias/;
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Abigail