Dynamic function call produces arguments.count error

[JulienChavee]

Bug report

We have phpstan reporting false positive errors for dynamically function calls, when calls are conditioned with some checks before the call, based on the a variable that is used to know which function will be called.

To avoid the error, I changed the "if" condition to match the complete function name that is called

Code snippet that reproduces the problem

https://phpstan.org/r/8d1e0f7e-2776-4e9d-ab9e-d393ce6b8dab

Expected output

It should not report error there

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[VincentLanglet]

https://phpstan.org/r/894d9788-c385-4d2f-8a0d-68336041e32e might help understanding the issue.

Seems like the conditional type (between the key and the value) exists, but is lost with the concatenation.

So currently you can do https://phpstan.org/r/5db97425-1de0-47a1-a388-284878b02ac3