use warnings;
use strict;
use List::MoreUtils 'minmax';
my $envres = [ [], [], [{time=>0.002},{}] ];
my ($min, $max) = minmax(map {$_->{time}} @{$envres->[2]});
use Data::Dump 'dump';
dump $min, $max;
__END__
Use of uninitialized value in subroutine entry at - line 5.
Use of uninitialized value in subroutine entry at - line 5.
(undef, 0.002)