Fix hole in subtyping of modules

We did not handle correctly the case exemplified by `range.scala`: A module this type, which
is compared with a getter to the same module. Seen in the wild in scala.math.BigDecimal.

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/pos/range.scala b/tests/pos/range.scala
new file mode 100644
index 000000000..9e7b5d1c9
--- /dev/null
+++ b/tests/pos/range.scala
@@ -0,0 +1,9 @@
+import scala.math._
+import collection.immutable.NumericRange
+object Test {
+  val r1: scala.collection.immutable.Range.Partial = ???
+  val r2: scala.Range.Partial = r1
+  def until(d: BigDecimal, end: BigDecimal): Range.Partial[BigDecimal, NumericRange.Exclusive[BigDecimal]] =
+    new Range.Partial(until(d, end, _))
+  def until(d: BigDecimal, end: BigDecimal, step: BigDecimal) = Range.BigDecimal(d, end, step)
+}