Merge pull request #10007 from griggt/close-fuzzballs

Add regression tests and close out already fixed fuzzball issues

Author: liufengyun

tests/fuzzy/i9292.scala

@@ -0,0 +1,4 @@
+trait I0[-I1] {
+def [@specialized(List[I2], i3
+val
+def i3(i4: Int }

tests/neg/i9330.scala

@@ -0,0 +1,4 @@
+val x = {
+  () == ""
+  implicit def foo[A: A] // error // error // error
+}

tests/neg/i9331.scala

@@ -0,0 +1,5 @@
+package object Foo {
+  (1: Any) match {
+    case Foo => 1  // error
+  }
+}

tests/neg/i9332.scala

@@ -0,0 +1,5 @@
+class A {
+  enum B extends java.lang.Enum[B] { // error: enum extending java.lang.Enum must be declared in a static scope
+    case C
+  }
+}