Fixes #4054.

No review.

1 files changed, 25 insertions, 0 deletions

diff --git a/test/files/run/t4054.scala b/test/files/run/t4054.scala
new file mode 100644
index 0000000000..83a58ef97c
--- /dev/null
+++ b/test/files/run/t4054.scala
@@ -0,0 +1,25 @@
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+object Test {
+  def main(args: Array[String]) {
+    val it = Iterator.from(1).map(n => n * n).scanLeft(0)(_+_)
+
+    assert(it.next == 0)
+    assert(it.next == 1)
+    assert(it.next == 5)
+    assert(it.next == 14)
+    assert(it.next == 30)
+    assert(it.next == 55)
+    assert(it.next == 91)
+    assert(it.next == 140)
+    assert(it.next == 204)
+    assert(it.next == 285)
+    assert(it.next == 385)
+  }
+}