The exeption should already be thown inside try-catch. (?)

Please approve #4389 before. I'm sure the test result will change.

The exeption should already be thown inside try-catch. (?)

Yes, I thought the same, but catch (Error $e) doesn't catch E_DEPRECATED, may be in PHP9, it will. You can verify it in https://onlinephp.io/c/8857c5. Your suggested '@' suppresses these errors.

I did not test. To avoid suppress-operator this should work, too. (???)

#4352 (comment)

I did not test. To avoid suppress-operator this should work, too. (???)

#4352 (comment)

No, it does not catch other types of errors, such as empty string.

I think its enough to fix the message in unit test.