Added test on special bridges

backend.native/tests/build.gradle

@@ -890,6 +890,11 @@ task bridges_linkTest(type: LinkKonanTest) {
     lib = "codegen/bridges/linkTest_lib.kt"
 }
 
+task bridges_special(type: RunKonanTest) {
+    goldValue = "Ok\n"
+    source = "codegen/bridges/special.kt"
+}
+
 task classDelegation_method(type: RunKonanTest) {
     goldValue = "OKOK\n"
     source = "codegen/classDelegation/method.kt"

backend.native/tests/codegen/bridges/special.kt

@@ -0,0 +1,41 @@
+package codegen.bridges.special
+
+import kotlin.test.*
+
+private object NotEmptyMap : MutableMap<Any, Int> {
+    override fun containsKey(key: Any): Boolean = true
+    override fun containsValue(value: Int): Boolean = true
+
+    // non-special bridges get(Object)Integer -> get(Object)I
+    override fun get(key: Any): Int = 1
+    override fun remove(key: Any): Int = 1
+
+    override val size: Int get() = 0
+    override fun isEmpty(): Boolean = true
+    override fun put(key: Any, value: Int): Int? = throw UnsupportedOperationException()
+    override fun putAll(from: Map<out Any, Int>): Unit = throw UnsupportedOperationException()
+    override fun clear(): Unit = throw UnsupportedOperationException()
+    override val entries: MutableSet<MutableMap.MutableEntry<Any, Int>> get() = null!!
+    override val keys: MutableSet<Any> get() = null!!
+    override val values: MutableCollection<Int> get() = null!!
+}
+
+fun box(): String {
+    val n = NotEmptyMap as MutableMap<Any?, Any?>
+
+    if (n.get(null) != null) return "fail 1"
+    if (n.containsKey(null)) return "fail 2"
+    if (n.containsValue(null)) return "fail 3"
+    if (n.remove(null) != null) return "fail 4"
+
+    if (n.get(1) == null) return "fail 5"
+    if (!n.containsKey("")) return "fail 6"
+    if (!n.containsValue(3)) return "fail 7"
+    if (n.remove("") == null) return "fail 8"
+
+    return "Ok"
+}
+
+@Test fun runTest() {
+    println(box())
+}