Bug report

The return type of PDOStatement::errorCode() is ?string, but PHPStan recognizes it as just string.

Code snippet that reproduces the problem

https://phpstan.org/r/c1d28a38-1cea-4a0b-b431-d3ff597c7f04

Expected output

The non-null assertion should be passed to narrow down the value to just string.

Did PHPStan help you today? Did it make you happy in any way?

No response