As pointed out to me by plocinic, the pattern m...

As pointed out to me by plocinic, the pattern matcher has been
indiscriminately clearing the MUTABLE flag on synthetic vals because it
is signalling itself with that bit and it didn't think anyone else would
ever notice. Someone did. Closes #3699, review by plocinic.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/files/run/bug3699.scala b/test/files/run/bug3699.scala
new file mode 100644
index 0000000000..0475353887
--- /dev/null
+++ b/test/files/run/bug3699.scala
@@ -0,0 +1,11 @@
+object Test {
+  def act: Int => Int = {
+    case _ =>
+      lazy val (a, b) = (3,9)
+      a
+      b
+  }
+  def main(args: Array[String]) = {
+    assert(act(1) == 9)
+  }
+}
\ No newline at end of file