Exceptions with constructor default values are copied incorrectly

[GerritKopp]

While writing an application with Ktor, I noticed that exceptions are copied with the wrong message when the exception has a constructor parameter with a default value:

When you have a class like

class MyException(message: String = "Default message") : RuntimeException(message)

and throw an exception with a custom message

throw MyException("Custom message")

and tryCopyException() in ExceptionsConstuctor.kt is called, the resulting exception will contain the message Default message instead of Custom message.

Sample Ktor project with test cases