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<?php error_reporting(E_ALL); function callbackFunction() {} class Foo { public function applyA(callable $errorCallback = null, bool $showProgress) {} } $foo = new Foo; $foo->applyA(showProgress: true);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: Foo::applyA(): Argument #1 ($errorCallback) not passed in /in/dLoTl:7 Stack trace: #0 /in/dLoTl(11): Foo->applyA(NULL, true) #1 {main} thrown in /in/dLoTl on line 7
Process exited with code 255.

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