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<?php try { $f = function () { $a = 1; yield from $a; }; foreach($f() as $var) { var_dump($var); } } catch(Throwable $e) { var_dump($e); }
Output for git.master, git.master_jit, rfc.property-hooks
object(Error)#4 (7) { ["message":protected]=> string(54) "Can use "yield from" only with arrays and Traversables" ["string":"Error":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(9) "/in/riXJp" ["line":protected]=> int(7) ["trace":"Error":private]=> array(1) { [0]=> array(4) { ["file"]=> string(9) "/in/riXJp" ["line"]=> int(9) ["function"]=> string(9) "{closure}" ["args"]=> array(0) { } } } ["previous":"Error":private]=> NULL }

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