Call to function is_callable() with array{...} will always evaluate to true

[proton-ab]

Bug report

An error is reported stating that call to is_callable will always resolve to true, however provided array of callables contains function that does not exist within callable class?

Code snippet that reproduces the problem

https://phpstan.org/r/9d6b9c24-6a61-49d1-b47b-811a2cc2a980

Expected output

After fixing this specific issue, PHPStan will report that function will always throw.

Realistically - no error should be reported here. I consider this kind of runtime check to be quite important and I am not convinced we should actively discourage from having them and relying only on PHPStan ability to catch this in CI (as shown in this issue, it is prone to failure).

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No response

[VincentLanglet]

Hi, thanks for the report ; I tried a fix in phpstan/phpstan-src#3637