Added phase to check `New` nodes for instantiability.

- Abstract classes cannot be instantiated (exceptions:
  parent news and Java annotations)
- Instantiateed class must conform to its self type.

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/neg/instantiateAbstract.scala b/tests/neg/instantiateAbstract.scala
new file mode 100644
index 000000000..1e119a8b5
--- /dev/null
+++ b/tests/neg/instantiateAbstract.scala
@@ -0,0 +1,38 @@
+abstract class AA
+
+trait TT
+
+class A { self: B =>
+
+}
+
+@scala.annotation.Annotation class C // error
+
+class B extends A() {
+}
+
+object Test {
+
+  @scala.annotation.Annotation type T = String // error
+  @scala.annotation.Annotation val x = 1 // error
+  @scala.annotation.Annotation def f = 1 //error
+
+  (1: @scala.annotation.Annotation) // error
+
+
+  new AA // error
+
+  new TT // error
+
+  new A // error
+
+// the following are OK in Typer but would be caught later in RefChecks
+
+  new A() {}
+
+  new AA() {}
+
+  object O extends A
+
+  object OO extends AA
+}