1 files changed, 13 insertions, 0 deletions
diff --git a/tests/run/t4398.scala b/tests/run/t4398.scala
new file mode 100644
index 000000000..5e152f727
--- /dev/null
+++ b/tests/run/t4398.scala
@@ -0,0 +1,13 @@
+
+
+import scala.language.{ postfixOps }
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    val x = 1 to 10 toSet
+    val y = x + 5
+    val z = y - 154321
+    assert(x eq y)
+    assert(x eq z)
+  }
+}