Test for already closed #3088. No review.

[Editorial correction: r23000 was submitted by Johannes Rudolph and my
name inadvertently replaced his in the windy path from git to svn. The
comments and code are his. Posterity, take note!]

1 files changed, 9 insertions, 0 deletions

diff --git a/test/files/run/bug3088.scala b/test/files/run/bug3088.scala
new file mode 100644
index 0000000000..ea820b1c9c
--- /dev/null
+++ b/test/files/run/bug3088.scala
@@ -0,0 +1,9 @@
+import collection.mutable._
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    val b = new ListBuffer[Int]
+    b += 1
+    b ++= b
+  }
+}