2 files changed, 14 insertions, 0 deletions
diff --git a/test/files/pos/t7183.flags b/test/files/pos/t7183.flags
new file mode 100644
index 0000000000..e8fb65d50c
--- /dev/null
+++ b/test/files/pos/t7183.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
+\ No newline at end of file
diff --git a/test/files/pos/t7183.scala b/test/files/pos/t7183.scala
new file mode 100644
index 0000000000..7647c1634b
--- /dev/null
+++ b/test/files/pos/t7183.scala
@@ -0,0 +1,13 @@
+class A
+object A {
+  def unapply(a: A): Some[A] = Some(a) // Change return type to Option[A] and the warning is gone
+}
+
+object Test {
+  for (A(a) <- List(new A)) yield a // spurious dead code warning.
+}
+
+// List(new A()).withFilter(((check$ifrefutable$2) => check$ifrefutable$2: @scala.unchecked match {
+//  case A((a @ _)) => true
+//  case _ => false // this is dead code, but it's compiler generated.
+// }))