I am aware that it is almost hopeless to sift through the perldelta files. I did send some code snippets and hope (really hope) that somebody may spot the issue or ask for the offending code. This is how I go through the expected values: 
diag ("\n");
for my $delta ($delta_time, $delta_date){
    for my $field (qw (seconds minutes hours days months years)) {
    for my $type ('','total_') {
        my $func = "${type}${field}";
        for my $prec ('','trunc') {
            diag ("comapring ".$delta->$func($prec)." to ".$test_value
+s[$test_index]." at ".$test_index." func=".$func." prec=".$prec." typ
+e=".$type." field=".$field);
         ok($delta->$func($prec) == $test_values[$test_index++],"$func
+($prec) ($delta_text[$delta_index])")
           #or diag("Expected " . $test_values[$test_index++] . " got 
+" . $delta->$func($prec));
          or diag("Expected " . $test_values[$test_index] . " got " . 
+$delta->$func($prec));
        }
    }
    }
    $delta_index++;
}

[download]
I do not see in the code where Date::Manip methods are used

In reply to Re^2: Overcoming 5.10.0 vs 5.38.2 incompatibilities by zatlas1
in thread Overcoming 5.10.0 vs 5.38.2 incompatibilities by zatlas1

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