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<?php function foo() { yield 1; yield 2; yield 3; yield 4; } $fooG = foo(); var_dump($fooG instanceof Traversable); array_walk($fooG, function ($foo) { var_dump($foo); }); iterator_apply($fooG, function ($foo) { var_dump($foo); });
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 0 passed and exactly 1 expected in /in/n70qm:20 Stack trace: #0 [internal function]: {closure}() #1 /in/n70qm(20): iterator_apply(Object(Generator), Object(Closure)) #2 {main} thrown in /in/n70qm on line 20
Process exited with code 255.

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