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--TEST--
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object link operator
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--FILE--
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<?php
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function main()
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{
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$a = 1;
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$b = &$a;
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$b = 2;
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var_dump($a, $b);
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unset($b);
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var_dump($a);
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var_dump(isset($b));
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// var_dump($b ?? 123); // 修复前这个报错
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$b = 1;
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var_dump($b, $a);
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}
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?>
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--EXPECT--
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int(2)
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int(2)
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int(2)
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bool(false)
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int(1)
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int(2)
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