Description:
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A foreach by value after a foreach by reference repeats the last element.

Test script:
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$array[] = 'a';
$array[] = 'b';
$array[] = 'c';
$array[] = 'd';
$array[] = 'e';

foreach ( $array as &$element )
  echo $element;

foreach ( $array as $element )
  echo $element;


Expected result:
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abcdeabcde

Actual result:
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abcdeabcdd