Warns when using the 3-arg QObject::connect that takes a lambda.
The recommendation is to use the 4-arg overload, which takes a context object
so that the lambda isn't executed when the context object is deleted.
It's very common to use lambdas to connect signals to slots with different number of arguments. This can result in a crash if the signal is emitted after the receiver is deleted.
In order to reduce false-positives, it will only warn if the lambda body dereferences at least one QObject (other than the sender).
It's very hard to not have any false-positives. If you find any you probably can just pass the sender again, as 3rd parameter.