VARIABLES T P

T <: Int
P <: Producer<T?>

type parameter bounds:
T <: Int
P <: Producer<T?>*, <: Producer<Int?>

status:
-hasCannotCaptureTypesError: false
-hasConflictingConstraints: false
-hasContradiction: false
-hasErrorInConstrainingTypes: false
-hasParameterConstraintError: false
-hasTypeInferenceIncorporationError: false
-hasTypeParameterWithUnsatisfiedOnlyInputTypesError: false
-hasUnknownParameters: false
-hasViolatedUpperBound: false
-isSuccessful: true

result:
T=Int
P=Producer<Int?>