You still left out the portion where you are reading from @{$EnvsToRun->{data}}. The thing to keep in mind here is that $EnvsToRun->{data} is a reference to an array. This array holds one entry per environment. That entry itself is a reference to another, inner array, which has 3 elements. I suspect you are reading it something like this: 
my ($environment, $duration, $config) = @{$EnvsToRun->{data}};

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That's not right, you'll get an array ref in $environment. You forgot that @{$EnvsToRun->{data}} holds many inner lists, each of them with 3 elements in it. To get the first one out by itself, you'd do something like this (note the ->[0]): 
my ($environment, $duration, $config) = @{$EnvsToRun->{data}->[0]};

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In practice, to deal with all of the combinations, you need to iterate over the outer array and then for each item there process the inner array. Like this: 
for my $CurrentEnv (@{$EnvsToRun->{data}}) {
    my ($environment, $duration, $config) = @$CurrentEnv;
    ...
}

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If you don't want many inner lists, but just the one, you shouldn't be using push at all when assigning to $EnvsToRun->{data}. Instead, a simple assignment: 
$EnvsToRun->{data} = [$environment, $duration, $config];
... later ...
($environment, $duration, $config) = @{$EnvsToRun->{data}};

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In reply to Re^7: Shift returning pointer by bellaire
in thread Shift returning pointer by rgb96

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