Load special override as HIDDEN in case of signature clash

#KT-10151 Fixed

compiler/testData/codegen/box/specialBuiltins/emptyList.kt

@@ -15,11 +15,17 @@ private object EmptyList : List<Nothing> {
 }
 
 fun box(): String {
-    val n = EmptyList as List<Any?>
+    val n = EmptyList as List<String>
 
-    if (n.contains(null)) return "fail 1"
-    if (n.indexOf(null) != -1) return "fail 2"
-    if (n.lastIndexOf(null) != -1) return "fail 3"
+    if (n.contains("")) return "fail 1"
+    if (n.indexOf("") != -1) return "fail 2"
+    if (n.lastIndexOf("") != -1) return "fail 3"
+
+    val nullAny = EmptyList as List<Any?>
+
+    if (nullAny.contains(null)) return "fail 4"
+    if (nullAny.indexOf(null) != -1) return "fail 5"
+    if (nullAny.lastIndexOf(null) != -1) return "fail 6"
 
     return "OK"
 }

compiler/testData/codegen/boxAgainstJava/specialBuiltins/CharBuffer.java

@@ -0,0 +1,27 @@
+public abstract class CharBuffer implements CharSequence {
+    public final int length() {
+        return 0;
+    }
+
+    public final char charAt(int index) {
+        return 'K';
+    }
+
+    // The key problem here is that `get` has the same signature as kotlin.CharSequence.get but completely different semantics
+    public abstract char get(int index);
+    public abstract CharBuffer subSequence(int start, int end);
+
+    public static CharBuffer impl() {
+        return new CharBuffer() {
+            @Override
+            public char get(int index) {
+                return 'O';
+            }
+
+            @Override
+            public CharBuffer subSequence(int start, int end) {
+                return null;
+            }
+        };
+    }
+}

compiler/testData/codegen/boxAgainstJava/specialBuiltins/CharBuffer.kt

@@ -0,0 +1,5 @@
+fun box(): String {
+    val cb: CharBuffer = CharBuffer.impl()
+
+    return cb.get(0).toString() + (cb as CharSequence).get(1).toString()
+}

compiler/testData/codegen/boxWithJava/collections/irrelevantRemoveAtOverrideInJava/J.java

@@ -1,5 +1,5 @@
 import java.util.*;
 
 public class J implements Container {
-    final public String removeAt(int index) { return "abc"; }
+   final public String removeAt(int index) { return "abc"; }
 }

compiler/testData/codegen/boxWithStdlib/fullJdk/charBuffer.kt

@@ -0,0 +1,9 @@
+import java.nio.CharBuffer
+
+fun box(): String {
+    val cb = CharBuffer.wrap("OK")
+    cb.position(1)
+    val o = cb[0]
+    val k = (cb as CharSequence).get(0)
+    return o.toString() + k
+}