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<?php namespace derp { class Foo {} } namespace herp { class BetterFoo extends \derp\Foo {} class Derp { public function __construct(DerpFoo $foo) {} } class_alias('DerpFoo', '\derp\Foo'); $f = new Derp(new BetterFoo); }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Class "DerpFoo" not found in /in/r5VqM on line 18 Fatal error: Uncaught TypeError: herp\Derp::__construct(): Argument #1 ($foo) must be of type herp\DerpFoo, herp\BetterFoo given, called in /in/r5VqM on line 20 and defined in /in/r5VqM:14 Stack trace: #0 /in/r5VqM(20): herp\Derp->__construct(Object(herp\BetterFoo)) #1 {main} thrown in /in/r5VqM on line 14
Process exited with code 255.

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