SI-6288 Position argument of unapply

`atPos(pos) { ... }` doesn't descend into children of
already positioned trees, we need to manually set the
position of `CODE.REF(binder)` to that of the stunt double
`Ident(nme.SELECTOR_DUMMY)`.

1 files changed, 25 insertions, 0 deletions

diff --git a/test/files/run/t6288.scala b/test/files/run/t6288.scala
new file mode 100644
index 0000000000..9d8fb990d7
--- /dev/null
+++ b/test/files/run/t6288.scala
@@ -0,0 +1,25 @@
+import scala.tools.partest._
+import java.io.{Console => _, _}
+
+object Test extends DirectTest {
+
+  override def extraSettings: String = "-usejavacp -Xprint:patmat -Xprint-pos -d " + testOutput.path
+
+  override def code =
+  """
+  |object Case3 {
+  |  def unapply(z: Any): Option[Int] = Some(-1)
+  |
+  |  "" match {
+  |    case Case3(nr) => ()
+  |  }
+  |}""".stripMargin.trim
+
+  override def show(): Unit = {
+    // Now: [84][84]Case3.unapply([84]x1);
+    // Was: [84][84]Case3.unapply([64]x1);
+    Console.withErr(System.out) {
+      compile()
+    }
+  }
+}