Disables NotNull checking unless -Ynotnull is g...

Disables NotNull checking unless -Ynotnull is given. Closes #3568,
review by odersky.

1 files changed, 46 insertions, 0 deletions

diff --git a/test/files/pos/bug3568.scala b/test/files/pos/bug3568.scala
new file mode 100644
index 0000000000..7cfb927138
--- /dev/null
+++ b/test/files/pos/bug3568.scala
@@ -0,0 +1,46 @@
+import scala.annotation._
+import scala.annotation.unchecked._
+import scala.collection._
+
+
+package object buffer {
+  val broken = new ArrayVec2() // commenting out this line causes the file to compile.
+
+  val works = Class.forName("buffer.ArrayVec2").newInstance().asInstanceOf[ArrayVec2]
+}
+
+package buffer {
+  object Main {
+    // ArrayVec2 can be compiled, instantiated and used.
+    def main(args: Array[String]) { println(works) }
+  }
+
+  trait ElemType { type Element; type Component <: ElemType }
+  trait Float1 extends ElemType { type Element = Float; type Component = Float1}
+  class Vec2 extends ElemType { type Element = Vec2;  type Component = Float1 }
+
+  abstract class BaseSeq[T <: ElemType, E]
+  extends IndexedSeq[E] with IndexedSeqOptimized[E, IndexedSeq[E]] {
+    def length = 1
+    def apply(i: Int) :E
+  }
+
+  abstract class GenericSeq[T <: ElemType] extends BaseSeq[T, T#Element]
+  trait DataArray[T <: ElemType] extends BaseSeq[T, T#Element]
+  trait DataView[T <: ElemType] extends BaseSeq[T, T#Element]
+  abstract class BaseFloat1 extends BaseSeq[Float1, Float]
+
+  class ArrayFloat1 extends BaseFloat1 with DataArray[Float1] {
+    def apply(i: Int) :Float = 0f
+  }
+
+  class ViewFloat1 extends BaseFloat1 with DataView[Float1] {
+    def apply(i: Int) :Float = 0f
+  }
+
+  class ArrayVec2(val backingSeq: ArrayFloat1)
+  extends GenericSeq[Vec2] with DataArray[Vec2] {
+    def this() = this(new ArrayFloat1)
+    def apply(i: Int) :Vec2 = null
+  }
+}
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