!!! WIP BUGFIX instantiation of singletons with new should fail?

[mhsdesign]

see https://github.com/neos/flow-development-collection/issues/3078

@robertlemke i talked with you about this behaviour and i could reproduce it as described to you in this test. What do you say, is this intended behaviour?

it does makes sense from a technical point of view, why it behaves like this, because the proxy contains this line in the constructor:

if (get_class($this) === 'Neos\Flow\Tests\Functional\ObjectManagement\Fixtures\SingletonClassA') \Neos\Flow\Core\Bootstrap::$staticObjectManager->setInstance('Neos\Flow\Tests\Functional\ObjectManagement\Fixtures\SingletonClassA', $this);

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