Fix #1820: condition of whether generates outer

Previously, we don't generate `outer` for the anonymous class `new Inner2 {}`.
This is incorrect, as `Inner2 {}` extends `A.Inner`, which requires an outer.

trait A {
  val a = "a"
  trait Inner {
    def f = println(a)
    def h = 3
  }
}

trait B extends A {
  trait Inner2 extends Inner
  new Inner2 {}
}

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/run/i1820.scala b/tests/run/i1820.scala
index bc4f63d9b..b39e6d108 100644
--- a/tests/run/i1820.scala
+++ b/tests/run/i1820.scala
@@ -6,9 +6,9 @@ class A {
   }
 }
 
-class Inner extends O.a.Inner
+class Inner extends Test.a.Inner
 
-object O {
+object Test {
   val a = new A
 
   def main(args: Array[String]): Unit = {