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t2712-2.scala:16: error: type mismatch;
found : test.Foo
required: test.Two[test.X1,Object]
Note: test.X2 <: Object (and test.Foo <: test.Two[test.X1,test.X2]), but trait Two is invariant in type B.
You may wish to define B as +B instead. (SLS 4.5)
test1(foo): One[X3] // fails with -Ypartial-unification enabled
^
t2712-2.scala:16: error: type mismatch;
found : test.Two[test.X1,Object]
required: test.One[test.X3]
test1(foo): One[X3] // fails with -Ypartial-unification enabled
^
two errors found
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