added a test case for KT-1131

testlib/test/StdLibIssuesTest.kt

@@ -0,0 +1,24 @@
+package test.stdlib.issues
+
+import java.util.List
+import std.util.*
+import stdhack.test.*
+
+private fun listDifference<T>(first : List<T>, second : List<T>) : List<T> {
+    return first.filter{ !second.contains(it) }.toList()
+}
+
+class StdLibIssuesTest() : TestSupport() {
+
+    fun test_KT_1131() {
+        val data = arrayList("blah", "foo", "bar")
+        val filterValues = arrayList("bar", "something", "blah")
+
+        expect(arrayList("foo")) {
+            val answer = listDifference(data, filterValues)
+            println("Found answer ${answer}")
+            answer
+        }
+    }
+
+}