1 files changed, 38 insertions, 0 deletions
diff --git a/test/files/neg/t7623.scala b/test/files/neg/t7623.scala
new file mode 100644
index 0000000000..5c40f37bc1
--- /dev/null
+++ b/test/files/neg/t7623.scala
@@ -0,0 +1,38 @@
+
+
+case class C(s: String, xs: Int*)
+
+object X { def unapplySeq(a: Any): Option[(String, Seq[Int])] = Some("", List(1,2,3)) }
+
+// for case classes with varargs, avoid misaligned patterns
+trait Ctest {
+  def f = C("") match { case C(s) => }
+
+  def g = C("") match { case C(s, t) => }
+
+  def h = C("") match { case C(s, t, u @ _*) => }
+
+  def ok = C("") match { case C(s, u @ _*) => }
+}
+// for extractors that unapplySeq: Option[(Something, Seq[_])], avoid misaligned patterns
+trait Xtest {
+  def f = "" match { case X(s) => }
+
+  def g = "" match { case X(s, t) => }
+
+  def h = "" match { case X(s, t, u @ _*) => }
+
+  def ok = "" match { case X(s, u @ _*) => }
+}
+// for extractors that unapplySeq: Option[Seq[_]], anything goes
+trait Rtest {
+  val r = "(a+)".r
+
+  def f = "" match { case r(s) => }
+
+  def g = "" match { case r(s, t) => }
+
+  def h = "" match { case r(s, t, u @ _*) => }
+
+  def whatever = "" match { case r(u @ _*) => }
+}