1 files changed, 35 insertions, 0 deletions
diff --git a/tests/untried/pos/t4717.scala b/tests/untried/pos/t4717.scala
new file mode 100644
index 000000000..ed35a8ad8
--- /dev/null
+++ b/tests/untried/pos/t4717.scala
@@ -0,0 +1,35 @@
+
+
+
+
+
+
+
+trait Bug1[@specialized(Boolean) A] extends TraversableOnce[A] {
+
+  def ++[B >: A](that: TraversableOnce[B]): Iterator[B] = new Iterator[B] {
+    lazy val it = that.toIterator
+    def hasNext = it.hasNext
+    def next = it.next
+  }
+
+}
+
+
+
+trait WorksFine[@specialized(Boolean) A] {
+  class SubBounds[B >: A] extends Bounds[B] {
+    lazy val it = ???
+  }
+  def x[B >: A]: Unit = new SubBounds[B]
+}
+
+
+trait Bounds[@specialized(Boolean) A] {
+  // okay without `>: A`
+  def x[B >: A]: Unit = new Bounds[B] {
+    lazy val it = ???  // def or val okay
+  }
+}
+
+