Fix and post/neg test cases for #1878.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/compiler/scala/tools/nsc/ast/TreeInfo.scala b/src/compiler/scala/tools/nsc/ast/TreeInfo.scala
index 3d023777f3..3eb6dc321b 100644
--- a/src/compiler/scala/tools/nsc/ast/TreeInfo.scala
+++ b/src/compiler/scala/tools/nsc/ast/TreeInfo.scala
@@ -276,6 +276,18 @@ abstract class TreeInfo {
     case _ => false
   }
 
+  /** The underlying pattern ignoring any bindings */
+  def unbind(x: Tree): Tree = x match {
+    case Bind(_, y) => unbind(y)
+    case y          => y
+  }
+
+  /** Is this tree a Star(_) after removing bindings? */
+  def isStar(x: Tree) = unbind(x) match {
+    case Star(_)  => true
+    case _        => false
+  }
+
   /** The method part of an application node
    */
   def methPart(tree: Tree): Tree = tree match {