Fixed type soundness problem someone raised on ...

Fixed type soundness problem someone raised on hackers news. Test in
override.scala. Review by moors.

3 files changed, 29 insertions, 0 deletions

diff --git a/test/files/neg/override.check b/test/files/neg/override.check
new file mode 100644
index 0000000000..0336fb2b11
--- /dev/null
+++ b/test/files/neg/override.check
@@ -0,0 +1,5 @@
+override.scala:9: error: overriding type T in trait A with bounds >: Int <: Int;
+ type T in trait B with bounds >: String <: String has incompatible type
+  lazy val x : A with B = x
+           ^
+one error found
diff --git a/test/files/neg/override.scala b/test/files/neg/override.scala
new file mode 100755
index 0000000000..764b06603a
--- /dev/null
+++ b/test/files/neg/override.scala
@@ -0,0 +1,15 @@
+trait X {
+  trait A { type T >: Int <: Int }
+  val x : A
+  var n : x.T = 3
+}
+
+trait Y extends X {
+  trait B { type T >: String <: String }
+  lazy val x : A with B = x
+  n = "foo"
+}
+
+object Test extends Application {
+  new Y {}
+}
diff --git a/test/files/pos/t3688.scala b/test/files/pos/t3688.scala
new file mode 100644
index 0000000000..0ac1cfe514
--- /dev/null
+++ b/test/files/pos/t3688.scala
@@ -0,0 +1,9 @@
+import collection.mutable
+import collection.JavaConversions._
+import java.{util => ju}
+
+object Test {
+
+ implicitly[mutable.Map[Int, String] => ju.Dictionary[Int, String]]
+
+}