Closes #3493. Review by extempore.

1 files changed, 15 insertions, 0 deletions

diff --git a/test/files/run/t3493.scala b/test/files/run/t3493.scala
new file mode 100644
index 0000000000..aafe7a3a4a
--- /dev/null
+++ b/test/files/run/t3493.scala
@@ -0,0 +1,15 @@
+
+
+
+
+object Test {
+
+  def main(args: Array[String]) {
+    import scala.collection.immutable._
+    val x = TreeSet("a", "b", "c", "d")
+    val x2 = x + "e"
+    assert(x2.toString == "TreeSet(a, b, c, d, e)")
+    assert(x2.toString == runtime.ScalaRunTime.stringOf(x2).trim)
+  }
+
+}