When a user enters a invalid value, the framework logs a WARN msg with stacktrace. Even when dev mode is disabled.
- an Action with an int as member
- a form with a text field for that int
- user enters a string
The framework tries to find a setter for that member (which is successful) and tries to set the value (which fails because the setter has wrong parameter type)
Then a stracktrace is logged as WARN.
It is a valid use case that users enter invalid data and no stracktrace should be logged (at least not when dev mode is disabled).