Don't want to chase NPEs around for the rest of...

Don't want to chase NPEs around for the rest of my life. Created
"NoCompilationUnit" and "NoSourceFile" objects to represent not-present
versions of these items. Seems a lot better than null. References
SI-4859, got past NPE only to uncover the actual problem. No review.

1 files changed, 15 insertions, 0 deletions

diff --git a/test/pending/pos/bug4859.scala b/test/pending/pos/bug4859.scala
new file mode 100644
index 0000000000..ec5abd966d
--- /dev/null
+++ b/test/pending/pos/bug4859.scala
@@ -0,0 +1,15 @@
+object O {
+  C().CC()
+  D().DD()
+}
+
+case class C() {
+  case class CC()
+}
+
+case class D() {
+  class DD()
+  object DD {
+    def apply() = new DD()
+  }
+}