MkT2 [Just 1]
Breakpoint 0 activated at print029.hs:7:1-14
Stopped at print029.hs:7:1-14
_result :: (t Int, t Int) = _
Stopped at print029.hs:7:10-14
_result :: (t Int, t Int) = _
x :: t Int = [Just 1]
y :: t Int = _