Confusing error with constructors and optional parameters

[eukreign]

I have the following code:

abstract class Row {}

abstract class TotalRow implements Row {}

class TestRow extends Row {
  TestRow(String first, [String second = ""]) {}
}

class TestTotalRow extends TestRow with TotalRow {
  TestTotalRow(String first, [String second = ""]): super(first, second);
}

https://dartpad.dartlang.org/d03416b40588306be9722f72b55fae2a

It produces a strange analyzer error related to optional parameters in constructor:

This mixin application is invalid because all of the constructors in the base class 'TestRow' have optional parameters.

Is this expected behavior? Is it not possible to forward to a constructor with optional parameters?

[Scorpiion]

Here is an even simpler code example based on @eukreign code, I tried to figure it out on a Dartpad after being posted on slack:

class MyParent { 
  MyParent(String firstName, [String lastName = ""]) {}
}

class MyMixin { }

class MyChildClass1 extends MyParent {
  MyChildClass1(String firstName, String lastName): super(firstName, lastName);
}

class MyChildClass2 extends MyParent with MyMixin {
  MyChildClass2(String firstName, String lastName): super(firstName, lastName);
}

MyChildClass1 works as expected, MyChildClass2 gets the error.

[eukreign]

Related:
#17610
#15101

[munificent]

Dupe of #15101.