Fixes #3563. Review by extempore.

1 files changed, 21 insertions, 0 deletions

diff --git a/test/files/run/bug3563.scala b/test/files/run/bug3563.scala
new file mode 100644
index 0000000000..8abbb60803
--- /dev/null
+++ b/test/files/run/bug3563.scala
@@ -0,0 +1,21 @@
+
+
+
+
+
+// ticket #3563
+object Test {
+
+  def main(args: Array[String]) {
+    var sum = 0
+    val setseq = Set(1, 2, 3, 4).toSeq
+    setseq.map( n => { sum += n; n * n }).head
+    assert(sum == 10)
+
+    sum = 0
+    val mapseq = Map(1 -> 1, 2 -> 2, 3 -> 3, 4 -> 4).toSeq
+    mapseq.map( n => { sum += n._1; (n._1 + n._1, n._2 * n._2) }).head
+    assert(sum == 10)
+  }
+
+}