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Diffstat (limited to 'tests/pos/boundspropagation.scala')
-rw-r--r-- | tests/pos/boundspropagation.scala | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/pos/boundspropagation.scala b/tests/pos/boundspropagation.scala new file mode 100644 index 000000000..164f1ae1a --- /dev/null +++ b/tests/pos/boundspropagation.scala @@ -0,0 +1,18 @@ +// test contributed by @retronym +object test1 { + class Base { + type N + + class Tree[-T >: N] + + def f(x: Any): Tree[N] = x match { + case y: Tree[_] => y + } + } + class Derived extends Base { + def g(x: Any): Tree[N] = x match { + case y: Tree[_] => y // now succeeds in dotc + } + } +} + |