1 files changed, 18 insertions, 0 deletions
diff --git a/tests/run/groupby.scala b/tests/run/groupby.scala
new file mode 100644
index 000000000..9a33ae289
--- /dev/null
+++ b/tests/run/groupby.scala
@@ -0,0 +1,18 @@
+
+
+
+// Fixes #3422
+object Test {
+
+  def main(args: Array[String]): Unit = {
+    val arr = Array.range(0,10)
+    val map = arr groupBy (_%2)
+    val v1 = map(0)
+    val v2 = map(0)
+    // this should hold, of course, assuming also that group by returns a regular
+    // map implementation, and does nothing fancy - and it should return just a
+    // hash map by default.
+    assert(v1 eq v2)
+  }
+
+}