You need to add an explicit row count check before your inner for loop to prevent infinite loop:

while (my $rows = $sth->fetchall_arrayref(undef, 3)) {
          # ^ this condition is always true
          #   why? because when there is nothing to fetch,
          #   $rows is reference to an empty array, not undef

  last if ($#$rows < 0); # break out of infinite loop

  for (@$rows) {
     ...

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I am using version 1.39 of DBI and I could not repeat the same error, fetch without execute, as you have indicated.

In reply to Re: DBI::fetchall_arrayref() error by Roger
in thread DBI::fetchall_arrayref() error by blokhead

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