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--TEST--
Bug #79821 (array grow during var_dump)
--FILE--
<?php
foreach (['var_dump', 'debug_zval_dump', 'var_export'] as $output) {
$foo = $bar = [];
for ($i = 0; $i < 3; $i++) {
$foo = [$foo, [&$bar]];
}
ob_start(function (string $buffer) use (&$bar) {
$bar[][] = null;
return '';
}, 64);
$output($foo[0]);
ob_end_clean();
}
echo "OK\n";
?>
--EXPECT--
OK
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