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--TEST--
Type inference for $ary[$idx]->prop +=
--FILE--
<?php
function test() {
$ary = [];
$ary[0]->y += 2;
var_dump(is_object($ary[0]));
}
try {
test();
} catch (Error $e) {
echo $e->getMessage(), "\n";
}
?>
--EXPECTF--
Warning: Undefined array key 0 in %s on line %d
Attempt to assign property "y" on null
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