Add test cases

Author: odersky

tests/pickling/i3149.scala

@@ -0,0 +1,7 @@
+sealed class Foo
+
+class Test {
+  def f = {
+    class Bar extends Foo
+  }
+}

tests/pos/i3149.scala

@@ -0,0 +1,14 @@
+sealed class Foo
+
+class Test {
+  def f = {
+    class Bar extends Foo
+  }
+  class C {
+    class Bar extends Foo
+  }
+  object O {
+    class Bar extends Foo
+  }
+}
+

tests/pos/i3149a.scala

@@ -0,0 +1,14 @@
+sealed class Foo
+
+object Foo {
+  def f = {
+    class Bar extends Foo
+  }
+  class C {
+    class Bar extends Foo
+  }
+  object O {
+    class Bar extends Foo
+  }
+}
+