Fix #1209: Skip redundant superclasses\supertraits.

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/run/redundantParents.scala b/tests/run/redundantParents.scala
new file mode 100644
index 000000000..0cd277bbb
--- /dev/null
+++ b/tests/run/redundantParents.scala
@@ -0,0 +1,30 @@
+
+trait T1
+trait T2 extends T1
+trait T3 extends T2
+trait T4 extends T3
+
+trait T5
+
+class C1 extends T2
+class C2 extends C1 with T4 with T5 with T1 with T2
+class C3 extends C1 with T5
+class C4 extends C2 with T5
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    val c1 = (new C1).getClass
+    val c2 = (new C2).getClass
+    val c3 = (new C3).getClass
+    val c4 = (new C4).getClass
+
+    println("C1 super class: " + c1.getSuperclass)
+    println("C1 interfaces: " + c1.getInterfaces.toList)
+    println("C2 super class: " + c2.getSuperclass)
+    println("C2 interfaces: " + c2.getInterfaces.toList)
+    println("C3 super class: " + c3.getSuperclass)
+    println("C3 interfaces: " + c3.getInterfaces.toList)
+    println("C4 super class: " + c4.getSuperclass)
+    println("C4 interfaces: " + c4.getInterfaces.toList)
+  }
+}