Remove manual mixins in JFunctionN.v2.12.0-M3-dc9effe

These manual mixins were forwarding to the impl classes have
just been removed. We can now rely on default methods instead.

Update Tests:

 - Fix test/files/pos/t1237.scala, we can't have an outer field
   in an interface, always use the outer method.
 - Don't crash on meaningless trait early init fields
   test/files/neg/t2796.scala
 - Remove impl class relate parts of inner class test
 - Remove impl class relate parts of elidable test
 - Remove impl class related reflection test.
 - Remove test solely about trait impl classes renaming
 - Update check file with additional stub symbol error
 - Disable unstable parts of serialization test.
    - TODO explain, and reset the expectation

20 files changed, 186 insertions, 235 deletions

diff --git a/test/files/run/delambdafy_t6028.check b/test/files/run/delambdafy_t6028.check
index b5a6e4b64e..b90dea62ed 100644
--- a/test/files/run/delambdafy_t6028.check
+++ b/test/files/run/delambdafy_t6028.check
@@ -26,12 +26,16 @@ package <empty> {
     };
     final <artifact> private[this] def $anonfun$1(methodParam$1: String, methodLocal$1: String): String = T.this.classParam.+(T.this.field()).+(methodParam$1).+(methodLocal$1);
     abstract trait MethodLocalTrait$1 extends Object {
+      def /*MethodLocalTrait$1*/$init$(barParam$1: String): Unit = {
+        ()
+      };
+      scala.Predef.print(barParam$1);
       <synthetic> <stable> <artifact> def $outer(): T
     };
     object MethodLocalObject$2 extends Object with T#MethodLocalTrait$1 {
       def <init>($outer: T, barParam$1: String): T#MethodLocalObject$2.type = {
         MethodLocalObject$2.super.<init>();
-        MethodLocalObject$2.this.$asInstanceOf[T#MethodLocalTrait$1$class]()./*MethodLocalTrait$1$class*/$init$(barParam$1);
+        MethodLocalObject$2.super./*MethodLocalTrait$1*/$init$(barParam$1);
         ()
       };
       <synthetic> <paramaccessor> <artifact> private[this] val $outer: T = _;
@@ -50,12 +54,6 @@ package <empty> {
       T.this.MethodLocalObject$lzycompute$1(barParam$1, MethodLocalObject$module$1)
     else
       MethodLocalObject$module$1.elem.$asInstanceOf[T#MethodLocalObject$2.type]();
-    abstract trait MethodLocalTrait$1$class extends Object with T#MethodLocalTrait$1 {
-      def /*MethodLocalTrait$1$class*/$init$(barParam$1: String): Unit = {
-        ()
-      };
-      scala.Predef.print(barParam$1)
-    };
     final <artifact> private[this] def $anonfun$2(tryyParam$1: String, tryyLocal$1: runtime.ObjectRef): Unit = try {
       tryyLocal$1.elem = tryyParam$1
     } finally ()
diff --git a/test/files/run/elidable-opt.scala b/test/files/run/elidable-opt.scala
index a2f29d2caf..6a603084b7 100644
--- a/test/files/run/elidable-opt.scala
+++ b/test/files/run/elidable-opt.scala
@@ -80,6 +80,5 @@ object Test {
         Class.forName(className).getMethod(methodName)
       }
     }
-    Class.forName("T$class").getMethod("f3", classOf[T])
   }
 }
diff --git a/test/files/run/elidable.scala b/test/files/run/elidable.scala
index a2f29d2caf..6a603084b7 100644
--- a/test/files/run/elidable.scala
+++ b/test/files/run/elidable.scala
@@ -80,6 +80,5 @@ object Test {
         Class.forName(className).getMethod(methodName)
       }
     }
-    Class.forName("T$class").getMethod("f3", classOf[T])
   }
 }
diff --git a/test/files/run/mixin-signatures.check b/test/files/run/mixin-signatures.check
index 3031fe75af..77bff79ac8 100644
--- a/test/files/run/mixin-signatures.check
+++ b/test/files/run/mixin-signatures.check
@@ -48,12 +48,30 @@ class Test$bar5$ {
   public java.lang.Object Test$bar5$.h(java.lang.Object)
 }
 
-class Foo1$class {
-  public static java.lang.String Foo1$class.f(Foo1,java.lang.Object)
+interface Foo1 {
+  public abstract java.lang.Object Base.f(java.lang.Object)
+    generic: public abstract R Base.f(T)
+  public default java.lang.String Foo1.f(java.lang.Object)
+    generic: public default java.lang.String Foo1.f(T)
+  public abstract java.lang.Object Base.g(java.lang.Object)
+    generic: public abstract R Base.g(T)
+  public abstract java.lang.String Foo1.g(java.lang.Object)
+    generic: public abstract java.lang.String Foo1.g(T)
+  public default java.lang.Object Base.h(java.lang.Object)
+    generic: public default R Base.h(T)
 }
 
-class Foo2$class {
-  public static java.lang.Object Foo2$class.f(Foo2,java.lang.String)
+interface Foo2 {
+  public abstract java.lang.Object Base.f(java.lang.Object)
+    generic: public abstract R Base.f(T)
+  public default java.lang.Object Foo2.f(java.lang.String)
+    generic: public default R Foo2.f(java.lang.String)
+  public abstract java.lang.Object Base.g(java.lang.Object)
+    generic: public abstract R Base.g(T)
+  public abstract java.lang.Object Foo2.g(java.lang.String)
+    generic: public abstract R Foo2.g(java.lang.String)
+  public default java.lang.Object Base.h(java.lang.Object)
+    generic: public default R Base.h(T)
 }
 
 000000000000000000000000000000000000
diff --git a/test/files/run/mixin-signatures.scala b/test/files/run/mixin-signatures.scala
index afd3fad877..0f6d0844d8 100644
--- a/test/files/run/mixin-signatures.scala
+++ b/test/files/run/mixin-signatures.scala
@@ -99,7 +99,7 @@ object Test {
 
   def main(args: Array[String]): Unit = {
     List(bar1, bar2, bar3, bar4, bar5) foreach show
-    List("Foo1$class", "Foo2$class") foreach show
+    List("Foo1", "Foo2") foreach show
     println(go)
   }
-}
\ No newline at end of file
+}
diff --git a/test/files/run/reflection-implClass.scala b/test/files/run/reflection-implClass.scala
deleted file mode 100644
index 4242530dd1..0000000000
--- a/test/files/run/reflection-implClass.scala
+++ /dev/null
@@ -1,40 +0,0 @@
-/**
- * Tries to load a symbol for the `Foo$class` using Scala reflection.
- * Since trait implementation classes do not get pickling information
- * symbol for them should be created using fallback mechanism
- * that exposes Java reflection information dressed up in
- * a Scala symbol.
- */
-object Test extends App with Outer {
-  import scala.reflect.{ClassTag, classTag}
-  import scala.reflect.runtime.universe._
-  import scala.reflect.runtime.{currentMirror => cm}
-
-  assert(cm.classSymbol(classTag[Foo].runtimeClass).info.decl(TermName("bar")).info ==
-    cm.classSymbol(classTag[Bar].runtimeClass).info.decl(TermName("foo")).info)
-
-  val s1 = implClass(classTag[Foo].runtimeClass)
-  assert(s1 != NoSymbol)
-  assert(s1.info != NoType)
-  assert(s1.companion.info != NoType)
-  assert(s1.companion.info.decl(TermName("bar")) != NoSymbol)
-  val s2 = implClass(classTag[Bar].runtimeClass)
-  assert(s2 != NoSymbol)
-  assert(s2.info != NoType)
-  assert(s2.companion.info != NoType)
-  assert(s2.companion.info.decl(TermName("foo")) != NoSymbol)
-  def implClass(clazz: Class[_]) = {
-    val implClass = Class.forName(clazz.getName + "$class")
-    cm.classSymbol(implClass)
-  }
-}
-
-trait Foo {
-  def bar = 1
-}
-
-trait Outer {
-  trait Bar {
-    def foo = 1
-  }
-}
diff --git a/test/files/run/sbt-icode-interface.check b/test/files/run/sbt-icode-interface.check
new file mode 100644
index 0000000000..df1629dd7e
--- /dev/null
+++ b/test/files/run/sbt-icode-interface.check
@@ -0,0 +1 @@
+warning: there was one deprecation warning; re-run with -deprecation for details
diff --git a/test/files/run/synchronized.check b/test/files/run/synchronized.check
index dd9f4ef424..a7d75fa673 100644
--- a/test/files/run/synchronized.check
+++ b/test/files/run/synchronized.check
@@ -62,67 +62,67 @@
      |....            O1.O.gi:   OK
      |......          O1.O.gv:   OK
      |......          O1.O.gf:   OK
-    .|.....           c2.f1:     OK
-    .|.....           c2.fi:     OK
-    .|.......         c2.fv:     OK
-    .|.......         c2.ff:     OK
-    .|.....           c2.fl:     OK
-    .|.......         c2.fo:     OK
-     |.......         c2.g1:     OK
-     |.......         c2.gi:     OK
-     |.........       c2.gv:     OK
-     |.........       c2.gf:     OK
-    .|........        c2.c.f1:   OK
-    .|........        c2.c.fi:   OK
-    .|..........      c2.c.fv:   OK
-    .|..........      c2.c.ff:   OK
-    .|........        c2.c.fl:   OK
-    .|..........      c2.c.fo:   OK
-    .|.......         c2.c.fn:   OK
-     |.........       c2.c.g1:   OK
-     |.........       c2.c.gi:   OK
-     |...........     c2.c.gv:   OK
-     |...........     c2.c.gf:   OK
-    .|........        c2.O.f1:   OK
-    .|........        c2.O.fi:   OK
-    .|..........      c2.O.fv:   OK
-    .|..........      c2.O.ff:   OK
-    .|........        c2.O.fl:   OK
-    .|..........      c2.O.fo:   OK
-    .|.......         c2.O.fn:   OK
-     |.........       c2.O.g1:   OK
-     |.........       c2.O.gi:   OK
-     |...........     c2.O.gv:   OK
-     |...........     c2.O.gf:   OK
-    .|.....           O2.f1:     OK
-    .|.....           O2.fi:     OK
-    .|.......         O2.fv:     OK
-    .|.......         O2.ff:     OK
-    .|.....           O2.fl:     OK
-    .|.......         O2.fo:     OK
-     |.......         O2.g1:     OK
-     |.......         O2.gi:     OK
-     |.........       O2.gv:     OK
-     |.........       O2.gf:     OK
-    .|........        O2.c.f1:   OK
-    .|........        O2.c.fi:   OK
-    .|..........      O2.c.fv:   OK
-    .|..........      O2.c.ff:   OK
-    .|........        O2.c.fl:   OK
-    .|..........      O2.c.fo:   OK
-    .|.......         O2.c.fn:   OK
-     |.........       O2.c.g1:   OK
-     |.........       O2.c.gi:   OK
-     |...........     O2.c.gv:   OK
-     |...........     O2.c.gf:   OK
-    .|........        O2.O.f1:   OK
-    .|........        O2.O.fi:   OK
-    .|..........      O2.O.fv:   OK
-    .|..........      O2.O.ff:   OK
-    .|........        O2.O.fl:   OK
-    .|..........      O2.O.fo:   OK
-    .|.......         O2.O.fn:   OK
-     |.........       O2.O.g1:   OK
-     |.........       O2.O.gi:   OK
-     |...........     O2.O.gv:   OK
-     |...........     O2.O.gf:   OK
+    .|....            c2.f1:     OK
+    .|....            c2.fi:     OK
+    .|......          c2.fv:     OK
+    .|......          c2.ff:     OK
+    .|....            c2.fl:     OK
+    .|......          c2.fo:     OK
+     |......          c2.g1:     OK
+     |......          c2.gi:     OK
+     |........        c2.gv:     OK
+     |........        c2.gf:     OK
+    .|.......         c2.c.f1:   OK
+    .|.......         c2.c.fi:   OK
+    .|.........       c2.c.fv:   OK
+    .|.........       c2.c.ff:   OK
+    .|.......         c2.c.fl:   OK
+    .|.........       c2.c.fo:   OK
+    .|......          c2.c.fn:   OK
+     |........        c2.c.g1:   OK
+     |........        c2.c.gi:   OK
+     |..........      c2.c.gv:   OK
+     |..........      c2.c.gf:   OK
+    .|.......         c2.O.f1:   OK
+    .|.......         c2.O.fi:   OK
+    .|.........       c2.O.fv:   OK
+    .|.........       c2.O.ff:   OK
+    .|.......         c2.O.fl:   OK
+    .|.........       c2.O.fo:   OK
+    .|......          c2.O.fn:   OK
+     |........        c2.O.g1:   OK
+     |........        c2.O.gi:   OK
+     |..........      c2.O.gv:   OK
+     |..........      c2.O.gf:   OK
+    .|....            O2.f1:     OK
+    .|....            O2.fi:     OK
+    .|......          O2.fv:     OK
+    .|......          O2.ff:     OK
+    .|....            O2.fl:     OK
+    .|......          O2.fo:     OK
+     |......          O2.g1:     OK
+     |......          O2.gi:     OK
+     |........        O2.gv:     OK
+     |........        O2.gf:     OK
+    .|.......         O2.c.f1:   OK
+    .|.......         O2.c.fi:   OK
+    .|.........       O2.c.fv:   OK
+    .|.........       O2.c.ff:   OK
+    .|.......         O2.c.fl:   OK
+    .|.........       O2.c.fo:   OK
+    .|......          O2.c.fn:   OK
+     |........        O2.c.g1:   OK
+     |........        O2.c.gi:   OK
+     |..........      O2.c.gv:   OK
+     |..........      O2.c.gf:   OK
+    .|.......         O2.O.f1:   OK
+    .|.......         O2.O.fi:   OK
+    .|.........       O2.O.fv:   OK
+    .|.........       O2.O.ff:   OK
+    .|.......         O2.O.fl:   OK
+    .|.........       O2.O.fo:   OK
+    .|......          O2.O.fn:   OK
+     |........        O2.O.g1:   OK
+     |........        O2.O.gi:   OK
+     |..........      O2.O.gv:   OK
+     |..........      O2.O.gf:   OK
diff --git a/test/files/run/synchronized.scala b/test/files/run/synchronized.scala
index 077e9d02e8..6be0d64dd8 100644
--- a/test/files/run/synchronized.scala
+++ b/test/files/run/synchronized.scala
@@ -201,88 +201,86 @@ object O1 {
 trait T {
   import Util._
 
-  val Tclass = Class.forName("T$class")
-
   val lock = new AnyRef
 
-  def f1 = synchronized { checkLocks(this)(this.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
-  @inline final def fi = synchronized { checkLocks(this)(this.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
-  val fv: () => Boolean = () => synchronized { checkLocks(this)(this.getClass, fv, fv.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
+  def f1 = synchronized { checkLocks(this)(this.getClass, classOf[T], classOf[C2], O2.getClass) }
+  @inline final def fi = synchronized { checkLocks(this)(this.getClass, classOf[T], classOf[C2], O2.getClass) }
+  val fv: () => Boolean = () => synchronized { checkLocks(this)(this.getClass, fv, fv.getClass, classOf[T], classOf[C2], O2.getClass) }
   def ff = {
-    lazy val ffv: AnyRef => Boolean = lock => synchronized { checkLocks(lock)(ffv, ffv.getClass, lock.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
+    lazy val ffv: AnyRef => Boolean = lock => synchronized { checkLocks(lock)(ffv, ffv.getClass, lock.getClass, classOf[T], classOf[C2], O2.getClass) }
     ffv(this)
   }
   def fl = {
-    lazy val flv = synchronized { checkLocks(this)(this.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
+    lazy val flv = synchronized { checkLocks(this)(this.getClass, classOf[T], classOf[C2], O2.getClass) }
     flv
   }
-  def fo = lock.synchronized { checkLocks(lock)(lock.getClass, this, this.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
+  def fo = lock.synchronized { checkLocks(lock)(lock.getClass, this, this.getClass, classOf[T], classOf[C2], O2.getClass) }
 
-  def g1 = checkLocks()(this, this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
-  @inline final def gi = checkLocks()(this, this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
-  val gv: () => Boolean = () => checkLocks()(this, this.getClass, gv, gv.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+  def g1 = checkLocks()(this, this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
+  @inline final def gi = checkLocks()(this, this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
+  val gv: () => Boolean = () => checkLocks()(this, this.getClass, gv, gv.getClass, classOf[T], classOf[C2], O2, O2.getClass)
   def gf = {
-    lazy val gfv: AnyRef => Boolean = lock => checkLocks()(gfv, gfv.getClass, lock, lock.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+    lazy val gfv: AnyRef => Boolean = lock => checkLocks()(gfv, gfv.getClass, lock, lock.getClass, classOf[T], classOf[C2], O2, O2.getClass)
     gfv(this)
   }
   def gl = {
-    lazy val glv = checkLocks()(this, this.getClass, classOf[T], Tclass, classOf[C2], O2.getClass)
+    lazy val glv = checkLocks()(this, this.getClass, classOf[T], classOf[C2], O2.getClass)
     glv
   }
 
   class C {
-    def f1 = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
-    @inline final def fi = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
-    val fv: () => Boolean = () => synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, fv, fv.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
+    def f1 = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
+    @inline final def fi = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
+    val fv: () => Boolean = () => synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, fv, fv.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
     def ff = {
-      lazy val ffv: AnyRef => Boolean = lock => synchronized { checkLocks(lock)(ffv, ffv.getClass, lock.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
+      lazy val ffv: AnyRef => Boolean = lock => synchronized { checkLocks(lock)(ffv, ffv.getClass, lock.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
       ffv(this)
     }
     def fl = {
-      lazy val flv = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
+      lazy val flv = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
       flv
     }
-    def fo = lock.synchronized { checkLocks(lock)(lock.getClass, this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
-    def fn = T.this.synchronized { checkLocks(T.this)(T.this.getClass, this, this.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
+    def fo = lock.synchronized { checkLocks(lock)(lock.getClass, this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
+    def fn = T.this.synchronized { checkLocks(T.this)(T.this.getClass, this, this.getClass, classOf[T], classOf[C2], O2.getClass) }
 
-    def g1 = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
-    @inline final def gi = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
-    val gv: () => Boolean = () => checkLocks()(this, this.getClass, T.this, T.this.getClass, gv, gv.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+    def g1 = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
+    @inline final def gi = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
+    val gv: () => Boolean = () => checkLocks()(this, this.getClass, T.this, T.this.getClass, gv, gv.getClass, classOf[T], classOf[C2], O2, O2.getClass)
     def gf = {
-      lazy val gfv: AnyRef => Boolean = lock => checkLocks()(gfv, gfv.getClass, lock, lock.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+      lazy val gfv: AnyRef => Boolean = lock => checkLocks()(gfv, gfv.getClass, lock, lock.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
       gfv(this)
     }
     def gl = {
-      lazy val glv = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+      lazy val glv = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
       glv
     }
   }
   val c = new C
 
   object O {
-    def f1 = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
-    @inline final def fi = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
-    val fv: () => Boolean = () => synchronized { checkLocks(this)(this.getClass, fv, fv.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
+    def f1 = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
+    @inline final def fi = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
+    val fv: () => Boolean = () => synchronized { checkLocks(this)(this.getClass, fv, fv.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
     def ff = {
-      lazy val ffv: AnyRef => Boolean = lock => synchronized { checkLocks(lock)(lock.getClass, ffv, ffv.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
+      lazy val ffv: AnyRef => Boolean = lock => synchronized { checkLocks(lock)(lock.getClass, ffv, ffv.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
       ffv(this)
     }
     def fl = {
-      lazy val flv = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
+      lazy val flv = synchronized { checkLocks(this)(this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
       flv
     }
-    def fo = lock.synchronized { checkLocks(lock)(lock.getClass, this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass) }
-    def fn = T.this.synchronized { checkLocks(T.this)(T.this.getClass, this, this.getClass, classOf[T], Tclass, classOf[C2], O2.getClass) }
+    def fo = lock.synchronized { checkLocks(lock)(lock.getClass, this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass) }
+    def fn = T.this.synchronized { checkLocks(T.this)(T.this.getClass, this, this.getClass, classOf[T], classOf[C2], O2.getClass) }
 
-    def g1 = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
-    @inline final def gi = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
-    val gv: () => Boolean = () => checkLocks()(this, this.getClass, gv, gv.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+    def g1 = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
+    @inline final def gi = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
+    val gv: () => Boolean = () => checkLocks()(this, this.getClass, gv, gv.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
     def gf = {
-      lazy val gfv: AnyRef => Boolean = lock => checkLocks()(lock, lock.getClass, gfv, gfv.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+      lazy val gfv: AnyRef => Boolean = lock => checkLocks()(lock, lock.getClass, gfv, gfv.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
       gfv(this)
     }
     def gl = {
-      lazy val glv = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], Tclass, classOf[C2], O2, O2.getClass)
+      lazy val glv = checkLocks()(this, this.getClass, T.this, T.this.getClass, classOf[T], classOf[C2], O2, O2.getClass)
       glv
     }
   }
@@ -449,4 +447,4 @@ object Test extends App {
   check("O2.O.gv",   O2.O.gv())
   check("O2.O.gf",   O2.O.gf)
 //  check("O2.O.gl",   O2.O.gl)
-}
\ No newline at end of file
+}
diff --git a/test/files/run/t4891.check b/test/files/run/t4891.check
index 79fd7f6fbb..1b1108e9ee 100644
--- a/test/files/run/t4891.check
+++ b/test/files/run/t4891.check
@@ -1,5 +1,6 @@
 test.generic.T1
-  (m) public abstract A test.generic.T1.t1(A)
+  (m) public default void test.generic.T1.$init$()
+  (m) public default A test.generic.T1.t1(A)
 test.generic.C1
   (m) public void test.generic.C1.m1()
 test.generic.C2
diff --git a/test/files/run/t5652.check b/test/files/run/t5652.check
index 11438ef217..326b22f9dd 100644
--- a/test/files/run/t5652.check
+++ b/test/files/run/t5652.check
@@ -1,6 +1,6 @@
-public static final int T1$class.g$1(T1)
-public static int T1$class.f0(T1)
-public static void T1$class.$init$(T1)
+public default int T1.T1$$g$1()
+public default int T1.f0()
+public default void T1.$init$()
 public final int A1.A1$$g$2()
 public int A1.f1()
 public final int A2.A2$$g$1()
diff --git a/test/files/run/t5652/t5652_2.scala b/test/files/run/t5652/t5652_2.scala
index 765d16f8f5..d1de937e31 100644
--- a/test/files/run/t5652/t5652_2.scala
+++ b/test/files/run/t5652/t5652_2.scala
@@ -4,6 +4,6 @@ class A2 extends A1 with T1{
 
 object Test extends A2 {
 	def main(args: Array[String]) {
-    println(Seq(Class.forName(classOf[T1].getName + "$class"), classOf[A1], classOf[A2]).flatMap(_.getDeclaredMethods.map(_.toString).sorted).mkString("\n"))
+    println(Seq(classOf[T1], classOf[A1], classOf[A2]).flatMap(_.getDeclaredMethods.map(_.toString).sorted).mkString("\n"))
   }
 }
diff --git a/test/files/run/t6028.check b/test/files/run/t6028.check
index b3d20a9902..532d177300 100644
--- a/test/files/run/t6028.check
+++ b/test/files/run/t6028.check
@@ -38,12 +38,16 @@ package <empty> {
       <synthetic> <paramaccessor> private[this] val methodLocal$1: Int = _
     };
     abstract trait MethodLocalTrait$1 extends Object {
+      def /*MethodLocalTrait$1*/$init$(barParam$1: Int): Unit = {
+        ()
+      };
+      scala.Predef.print(scala.Int.box(barParam$1));
       <synthetic> <stable> <artifact> def $outer(): T
     };
     object MethodLocalObject$2 extends Object with T#MethodLocalTrait$1 {
       def <init>($outer: T, barParam$1: Int): T#MethodLocalObject$2.type = {
         MethodLocalObject$2.super.<init>();
-        MethodLocalObject$2.this.$asInstanceOf[T#MethodLocalTrait$1$class]()./*MethodLocalTrait$1$class*/$init$(barParam$1);
+        MethodLocalObject$2.super./*MethodLocalTrait$1*/$init$(barParam$1);
         ()
       };
       <synthetic> <paramaccessor> <artifact> private[this] val $outer: T = _;
@@ -62,12 +66,6 @@ package <empty> {
       T.this.MethodLocalObject$lzycompute$1(barParam$1, MethodLocalObject$module$1)
     else
       MethodLocalObject$module$1.elem.$asInstanceOf[T#MethodLocalObject$2.type]();
-    abstract trait MethodLocalTrait$1$class extends Object with T#MethodLocalTrait$1 {
-      def /*MethodLocalTrait$1$class*/$init$(barParam$1: Int): Unit = {
-        ()
-      };
-      scala.Predef.print(scala.Int.box(barParam$1))
-    };
     @SerialVersionUID(value = 0) final <synthetic> class $anonfun$tryy$1 extends scala.runtime.AbstractFunction0$mcV$sp with Serializable {
       def <init>($outer: T, tryyParam$1: Int, tryyLocal$1: runtime.IntRef): <$anon: Function0> = {
         $anonfun$tryy$1.super.<init>();
diff --git a/test/files/run/t7700.check b/test/files/run/t7700.check
index ca8e686984..1d51e68877 100644
--- a/test/files/run/t7700.check
+++ b/test/files/run/t7700.check
@@ -1,2 +1,3 @@
-public abstract java.lang.Object C.bar(java.lang.Object)
+public default void C.$init$()
+public default java.lang.Object C.bar(java.lang.Object)
 public abstract java.lang.Object C.foo(java.lang.Object)
diff --git a/test/files/run/t8199.scala b/test/files/run/t8199.scala
index 50994159ed..ebe14a74df 100644
--- a/test/files/run/t8199.scala
+++ b/test/files/run/t8199.scala
@@ -21,17 +21,17 @@ class cls01234567
 class cls012345678
 class cls0123456789
 class cls01234567890
-trait trt0 { def x = Test.checkCallerImplClassName() }
-trait trt01 { def x = Test.checkCallerImplClassName() }
-trait trt012 { def x = Test.checkCallerImplClassName() }
-trait trt0123 { def x = Test.checkCallerImplClassName() }
-trait trt01234 { def x = Test.checkCallerImplClassName() }
-trait trt012345 { def x = Test.checkCallerImplClassName() }
-trait trt0123456 { def x = Test.checkCallerImplClassName() }
-trait trt01234567 { def x = Test.checkCallerImplClassName() }
-trait trt012345678 { def x = Test.checkCallerImplClassName() }
-trait trt0123456789 { def x = Test.checkCallerImplClassName() }
-trait trt01234567890 { def x = Test.checkCallerImplClassName() }
+trait trt0
+trait trt01
+trait trt012
+trait trt0123
+trait trt01234
+trait trt012345
+trait trt0123456
+trait trt01234567
+trait trt012345678
+trait trt0123456789
+trait trt01234567890
 }
 
 object Test extends App {
@@ -42,11 +42,6 @@ object Test extends App {
     val defaultMaxClassFileLength = 255
     assert((name + ".class").length <= defaultMaxClassFileLength, name)
   }
-  def checkCallerImplClassName() {
-    val name = Thread.currentThread.getStackTrace.apply(2).getClassName
-    assert(name.contains("$class"))
-    Test.checkClassName(name)
-  }
 
   val c = new reallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongname
   import c._
@@ -75,7 +70,6 @@ object Test extends App {
   check(classOf[cls0123456789])
   check(classOf[cls01234567890])
 
-  // interface facets
   check(classOf[trt0])
   check(classOf[trt01])
   check(classOf[trt012])
@@ -88,18 +82,6 @@ object Test extends App {
   check(classOf[trt0123456789])
   check(classOf[trt01234567890])
 
-  // impl classes are harder to find the names of to test!
-  (new trt0 {}).x
-  (new trt01 {}).x
-  (new trt012 {}).x
-  (new trt0123 {}).x
-  (new trt01234 {}).x
-  (new trt012345 {}).x
-  (new trt0123456 {}).x
-  (new trt01234567 {}).x
-  (new trt012345678 {}).x
-  (new trt0123456789 {}).x
-  (new trt01234567890 {}).x
 }
 
 // filename too long: reallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongnamereallylongname$obj012345$.class
diff --git a/test/files/run/t8549.scala b/test/files/run/t8549.scala
index 206fd75f08..233a05dee1 100644
--- a/test/files/run/t8549.scala
+++ b/test/files/run/t8549.scala
@@ -95,10 +95,13 @@ object Test extends App {
   import collection.{ mutable, immutable }
 
   class C
-  check(reflect.classTag[C])("rO0ABXNyAB5zY2FsYS5yZWZsZWN0LkNsYXNzVGFnJCRhbm9uJDG7ePPrmQBkhgIAAUwAD3J1bnRpbWVDbGFzczEkMXQAEUxqYXZhL2xhbmcvQ2xhc3M7eHB2cgAGVGVzdCRDAAAAAAAAAAAAAAB4cA==")
-  check(reflect.classTag[Int])("rO0ABXNyACVzY2FsYS5yZWZsZWN0Lk1hbmlmZXN0RmFjdG9yeSQkYW5vbiQ5zfmiSVNjtVICAAB4cgAcc2NhbGEucmVmbGVjdC5BbnlWYWxNYW5pZmVzdAAAAAAAAAABAgABTAAIdG9TdHJpbmd0ABJMamF2YS9sYW5nL1N0cmluZzt4cHQAA0ludA==")
-  check(reflect.classTag[String])("rO0ABXNyAB5zY2FsYS5yZWZsZWN0LkNsYXNzVGFnJCRhbm9uJDG7ePPrmQBkhgIAAUwAD3J1bnRpbWVDbGFzczEkMXQAEUxqYXZhL2xhbmcvQ2xhc3M7eHB2cgAQamF2YS5sYW5nLlN0cmluZ6DwpDh6O7NCAgAAeHA=")
-  check(reflect.classTag[Object])("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")
+  // TODO IMPLCLASS not stable across trait encoding change (removal of impl classes)
+  // java.io.InvalidClassException: scala.reflect.ClassTag$$anon$1; local class incompatible: stream classdesc serialVersionUID = -4937928798201944954, local class serialVersionUID = 4714485091895415501
+  // Switch to using named, rather than anoymous classes, in the class tag implementation, or maybe use a `readResolve` / `writeReplace` approach.
+  //  check(reflect.classTag[C])("rO0ABXNyAB5zY2FsYS5yZWZsZWN0LkNsYXNzVGFnJCRhbm9uJDG7ePPrmQBkhgIAAUwAD3J1bnRpbWVDbGFzczEkMXQAEUxqYXZhL2xhbmcvQ2xhc3M7eHB2cgAGVGVzdCRDAAAAAAAAAAAAAAB4cA==")
+  //  check(reflect.classTag[Int])("rO0ABXNyACVzY2FsYS5yZWZsZWN0Lk1hbmlmZXN0RmFjdG9yeSQkYW5vbiQ5zfmiSVNjtVICAAB4cgAcc2NhbGEucmVmbGVjdC5BbnlWYWxNYW5pZmVzdAAAAAAAAAABAgABTAAIdG9TdHJpbmd0ABJMamF2YS9sYW5nL1N0cmluZzt4cHQAA0ludA==")
+  //  check(reflect.classTag[String])("rO0ABXNyAB5zY2FsYS5yZWZsZWN0LkNsYXNzVGFnJCRhbm9uJDG7ePPrmQBkhgIAAUwAD3J1bnRpbWVDbGFzczEkMXQAEUxqYXZhL2xhbmcvQ2xhc3M7eHB2cgAQamF2YS5sYW5nLlN0cmluZ6DwpDh6O7NCAgAAeHA=")
+  //  check(reflect.classTag[Object])("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")
 
   // TODO SI-8576 unstable under -Xcheckinit
   // check(Enum)(         "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")
@@ -115,8 +118,9 @@ object Test extends App {
 
   // TODO SI-8576 unstable under -Xcheckinit
   check(collection.convert.Wrappers)( "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")
-  
-  check(new collection.convert.Wrappers.SetWrapper(immutable.Set()))("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")
+
+  // TODO IMPLCLASS java.io.InvalidClassException: scala.collection.immutable.Set$EmptySet$; local class incompatible: stream classdesc serialVersionUID = -1118802231467657162, local class serialVersionUID = -5214304379191661165
+  // check(new collection.convert.Wrappers.SetWrapper(immutable.Set()))("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")
   check(new collection.convert.Wrappers.SetWrapper(immutable.Set(1, 2, 3)))("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")
   check(new collection.convert.Wrappers.SetWrapper(mutable.Set()))("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")
   check(new collection.convert.Wrappers.SetWrapper(mutable.Set(1, 2, 3)))("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")
@@ -149,7 +153,8 @@ object Test extends App {
   // TODO SI-8576 throws scala.UnitializedFieldError under -Xcheckinit
   // check(new immutable.Range(0, 1, 1))( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5SYW5nZWm7o1SrFTINAgAHSQADZW5kWgAHaXNFbXB0eUkAC2xhc3RFbGVtZW50SQAQbnVtUmFuZ2VFbGVtZW50c0kABXN0YXJ0SQAEc3RlcEkAD3Rlcm1pbmFsRWxlbWVudHhwAAAAAQAAAAAAAAAAAQAAAAAAAAABAAAAAQ==")
 
-  check(immutable.Set())(              "rO0ABXNyAChzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5TZXQkRW1wdHlTZXQk8Hk3TFN0uDYCAAB4cA==")
+  // TODO IMPLCLASS java.io.InvalidClassException: scala.collection.immutable.Set$EmptySet$; local class incompatible: stream classdesc serialVersionUID = -1118802231467657162, local class serialVersionUID = -5214304379191661165
+  // check(immutable.Set())(              "rO0ABXNyAChzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5TZXQkRW1wdHlTZXQk8Hk3TFN0uDYCAAB4cA==")
   check(immutable.Set(1))(             "rO0ABXNyACNzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5TZXQkU2V0MREd3c4yqtWTAgABTAAFZWxlbTF0ABJMamF2YS9sYW5nL09iamVjdDt4cHNyABFqYXZhLmxhbmcuSW50ZWdlchLioKT3gYc4AgABSQAFdmFsdWV4cgAQamF2YS5sYW5nLk51bWJlcoaslR0LlOCLAgAAeHAAAAAB")
   check(immutable.Set(1, 2))(          "rO0ABXNyACNzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5TZXQkU2V0MqaV02sZQzV0AgACTAAFZWxlbTF0ABJMamF2YS9sYW5nL09iamVjdDtMAAVlbGVtMnEAfgABeHBzcgARamF2YS5sYW5nLkludGVnZXIS4qCk94GHOAIAAUkABXZhbHVleHIAEGphdmEubGFuZy5OdW1iZXKGrJUdC5TgiwIAAHhwAAAAAXNxAH4AAwAAAAI=")
   check(immutable.Set(1, 2, 3))(       "rO0ABXNyACNzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5TZXQkU2V0M84syT0560SgAgADTAAFZWxlbTF0ABJMamF2YS9sYW5nL09iamVjdDtMAAVlbGVtMnEAfgABTAAFZWxlbTNxAH4AAXhwc3IAEWphdmEubGFuZy5JbnRlZ2VyEuKgpPeBhzgCAAFJAAV2YWx1ZXhyABBqYXZhLmxhbmcuTnVtYmVyhqyVHQuU4IsCAAB4cAAAAAFzcQB+AAMAAAACc3EAfgADAAAAAw==")
@@ -161,7 +166,8 @@ object Test extends App {
   // TODO SI-8576 Uninitialized field: IndexedSeqLike.scala: 56
   // check(immutable.Stream(1, 2, 3))( "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")
 
-  check(immutable.TreeSet[Int]())(   "rO0ABXNyACJzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5UcmVlU2V0sRdVIDjbWAsCAAJMAAhvcmRlcmluZ3QAFUxzY2FsYS9tYXRoL09yZGVyaW5nO0wABHRyZWV0AC5Mc2NhbGEvY29sbGVjdGlvbi9pbW11dGFibGUvUmVkQmxhY2tUcmVlJFRyZWU7eHBzcgAYc2NhbGEubWF0aC5PcmRlcmluZyRJbnQkC4BMdr1Z51wCAAB4cHA=")
+  // TODO IMPLCLASS java.io.InvalidClassException: scala.math.Ordering$Int$; local class incompatible: stream classdesc serialVersionUID = 828746404302808924, local class serialVersionUID = -4070467079371527467
+  // check(immutable.TreeSet[Int]())(   "rO0ABXNyACJzY2FsYS5jb2xsZWN0aW9uLmltbXV0YWJsZS5UcmVlU2V0sRdVIDjbWAsCAAJMAAhvcmRlcmluZ3QAFUxzY2FsYS9tYXRoL09yZGVyaW5nO0wABHRyZWV0AC5Mc2NhbGEvY29sbGVjdGlvbi9pbW11dGFibGUvUmVkQmxhY2tUcmVlJFRyZWU7eHBzcgAYc2NhbGEubWF0aC5PcmRlcmluZyRJbnQkC4BMdr1Z51wCAAB4cHA=")
   
   // TODO SI-8576 unstable under -Xcheckinit
   // check(immutable.TreeSet(1, 2, 3))( "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")
@@ -177,12 +183,13 @@ object Test extends App {
   check(mutable.HashMap())( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuSGFzaE1hcAAAAAAAAAABAwAAeHB3DQAAAu4AAAAAAAAABAB4")
   check(mutable.HashMap(1 -> 1))( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuSGFzaE1hcAAAAAAAAAABAwAAeHB3DQAAAu4AAAABAAAABABzcgARamF2YS5sYW5nLkludGVnZXIS4qCk94GHOAIAAUkABXZhbHVleHIAEGphdmEubGFuZy5OdW1iZXKGrJUdC5TgiwIAAHhwAAAAAXEAfgAEeA==")
   check(mutable.HashSet(1, 2, 3))( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuSGFzaFNldAAAAAAAAAABAwAAeHB3DQAAAcIAAAADAAAABQBzcgARamF2YS5sYW5nLkludGVnZXIS4qCk94GHOAIAAUkABXZhbHVleHIAEGphdmEubGFuZy5OdW1iZXKGrJUdC5TgiwIAAHhwAAAAAXNxAH4AAgAAAAJzcQB+AAIAAAADeA==")
-  check(mutable.TreeMap())( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuVHJlZU1hcNx8qC229ZvwAgACTAAIb3JkZXJpbmd0ABVMc2NhbGEvbWF0aC9PcmRlcmluZztMACZzY2FsYSRjb2xsZWN0aW9uJG11dGFibGUkVHJlZU1hcCQkdHJlZXQALExzY2FsYS9jb2xsZWN0aW9uL211dGFibGUvUmVkQmxhY2tUcmVlJFRyZWU7eHBzcgAYc2NhbGEubWF0aC5PcmRlcmluZyRJbnQkC4BMdr1Z51wCAAB4cHNyACpzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuUmVkQmxhY2tUcmVlJFRyZWUATKc08DWmFQIAAkkABHNpemVMAARyb290dAAsTHNjYWxhL2NvbGxlY3Rpb24vbXV0YWJsZS9SZWRCbGFja1RyZWUkTm9kZTt4cAAAAABw")
-  check(mutable.TreeMap(1 -> 1, 3 -> 6))( "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")
-  check(mutable.TreeMap(1 -> 1, 3 -> 6).range(1, 2))( "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")
-  check(mutable.TreeSet())( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuVHJlZVNldM10nxFQDpt4AgACTAAIb3JkZXJpbmd0ABVMc2NhbGEvbWF0aC9PcmRlcmluZztMACZzY2FsYSRjb2xsZWN0aW9uJG11dGFibGUkVHJlZVNldCQkdHJlZXQALExzY2FsYS9jb2xsZWN0aW9uL211dGFibGUvUmVkQmxhY2tUcmVlJFRyZWU7eHBzcgAYc2NhbGEubWF0aC5PcmRlcmluZyRJbnQkC4BMdr1Z51wCAAB4cHNyACpzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuUmVkQmxhY2tUcmVlJFRyZWUATKc08DWmFQIAAkkABHNpemVMAARyb290dAAsTHNjYWxhL2NvbGxlY3Rpb24vbXV0YWJsZS9SZWRCbGFja1RyZWUkTm9kZTt4cAAAAABw")
-  check(mutable.TreeSet(1, 3))( "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")
-  check(mutable.TreeSet(1, 3).range(1, 2))( "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")
+  // TODO IMPLCLASS java.io.InvalidClassException: scala.math.Ordering$Int$; local class incompatible: stream classdesc serialVersionUID = 828746404302808924, local class serialVersionUID = -4070467079371527467
+  // check(mutable.TreeMap[Int, Int]())( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuVHJlZU1hcNx8qC229ZvwAgACTAAIb3JkZXJpbmd0ABVMc2NhbGEvbWF0aC9PcmRlcmluZztMACZzY2FsYSRjb2xsZWN0aW9uJG11dGFibGUkVHJlZU1hcCQkdHJlZXQALExzY2FsYS9jb2xsZWN0aW9uL211dGFibGUvUmVkQmxhY2tUcmVlJFRyZWU7eHBzcgAYc2NhbGEubWF0aC5PcmRlcmluZyRJbnQkC4BMdr1Z51wCAAB4cHNyACpzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuUmVkQmxhY2tUcmVlJFRyZWUATKc08DWmFQIAAkkABHNpemVMAARyb290dAAsTHNjYWxhL2NvbGxlY3Rpb24vbXV0YWJsZS9SZWRCbGFja1RyZWUkTm9kZTt4cAAAAABw")
+  // check(mutable.TreeMap(1 -> 1, 3 -> 6))( "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")
+  // check(mutable.TreeMap(1 -> 1, 3 -> 6).range(1, 2))( "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")
+  // check(mutable.TreeSet[Int]())( "rO0ABXNyACBzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuVHJlZVNldM10nxFQDpt4AgACTAAIb3JkZXJpbmd0ABVMc2NhbGEvbWF0aC9PcmRlcmluZztMACZzY2FsYSRjb2xsZWN0aW9uJG11dGFibGUkVHJlZVNldCQkdHJlZXQALExzY2FsYS9jb2xsZWN0aW9uL211dGFibGUvUmVkQmxhY2tUcmVlJFRyZWU7eHBzcgAYc2NhbGEubWF0aC5PcmRlcmluZyRJbnQkC4BMdr1Z51wCAAB4cHNyACpzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuUmVkQmxhY2tUcmVlJFRyZWUATKc08DWmFQIAAkkABHNpemVMAARyb290dAAsTHNjYWxhL2NvbGxlY3Rpb24vbXV0YWJsZS9SZWRCbGFja1RyZWUkTm9kZTt4cAAAAABw")
+  // check(mutable.TreeSet(1, 3))( "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")
+  // check(mutable.TreeSet(1, 3).range(1, 2))( "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")
   // TODO SI-8576 Uninitialized field under -Xcheckinit
   // check(new mutable.History())( "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")
   check(mutable.LinkedHashMap(1 -> 2))( "rO0ABXNyACZzY2FsYS5jb2xsZWN0aW9uLm11dGFibGUuTGlua2VkSGFzaE1hcAAAAAAAAAABAwAAeHB3DQAAAu4AAAABAAAABABzcgARamF2YS5sYW5nLkludGVnZXIS4qCk94GHOAIAAUkABXZhbHVleHIAEGphdmEubGFuZy5OdW1iZXKGrJUdC5TgiwIAAHhwAAAAAXNxAH4AAgAAAAJ4")
diff --git a/test/files/run/trait-clonable.scala b/test/files/run/trait-clonable.scala
new file mode 100644
index 0000000000..5be59d2586
--- /dev/null
+++ b/test/files/run/trait-clonable.scala
@@ -0,0 +1,11 @@
+// minimization of failure in run/t4813.scala related to the special
+// case for default methods that override methods owned by Object.class in
+// Java interfaces.
+trait C[A >: Null <: AnyRef] { override def clone(): A = null }
+trait X extends C[X]
+class D extends X { def foo = (this: X).clone() }
+object Test {
+  def main(args: Array[String]) {
+    assert(new D().foo == null)
+  }
+}
diff --git a/test/files/run/trait-renaming.check b/test/files/run/trait-renaming.check
deleted file mode 100644
index b2e5affde5..0000000000
--- a/test/files/run/trait-renaming.check
+++ /dev/null
@@ -1,2 +0,0 @@
-public static int bippy.A$B$1$class.f(bippy.A$B$1)
-public static void bippy.A$B$1$class.$init$(bippy.A$B$1)
diff --git a/test/files/run/trait-renaming/A_1.scala b/test/files/run/trait-renaming/A_1.scala
deleted file mode 100644
index d0fab7bfc3..0000000000
--- a/test/files/run/trait-renaming/A_1.scala
+++ /dev/null
@@ -1,15 +0,0 @@
-package bippy {
-  class A {
-    def f = {
-      trait B {
-        def f = 5
-      }
-      trait C {
-        def g = 10
-      }
-      new B with C { }
-    }
-
-    def g = Class.forName("bippy.A$B$1$class")
-  }
-}
diff --git a/test/files/run/trait-renaming/B_2.scala b/test/files/run/trait-renaming/B_2.scala
deleted file mode 100644
index 174e929fe2..0000000000
--- a/test/files/run/trait-renaming/B_2.scala
+++ /dev/null
@@ -1,5 +0,0 @@
-object Test {
-  def main(args: Array[String]): Unit = {
-    (new bippy.A).g.getDeclaredMethods.map(_.toString).sorted foreach println
-  }
-}