Fixed KT-2418 Front-end allows enum constants with same name

compiler/frontend/src/org/jetbrains/jet/lang/resolve/OverloadResolver.java

@@ -164,6 +164,14 @@ public class OverloadResolver {
     ) {
         MultiMap<Name, CallableMemberDescriptor> functionsByName = MultiMap.create();
         
+        if (classDescriptor.getKind() == ClassKind.ENUM_CLASS) {
+            MutableClassDescriptor classObjectDescriptor = (MutableClassDescriptor) classDescriptor.getClassObjectDescriptor();
+            assert classObjectDescriptor != null;
+            for (CallableMemberDescriptor memberDescriptor : classObjectDescriptor.getDeclaredCallableMembers()) {
+                functionsByName.putValue(memberDescriptor.getName(), memberDescriptor);
+            }
+        }
+
         for (CallableMemberDescriptor function : classDescriptor.getDeclaredCallableMembers()) {
             functionsByName.putValue(function.getName(), function);
         }

compiler/testData/diagnostics/tests/redeclarations/kt2418.kt

@@ -0,0 +1,27 @@
+//KT-2418 Front-end allows enum constants with same name
+
+package kt2418
+
+enum class A {
+    <!REDECLARATION!>FOO<!>
+    <!REDECLARATION!>FOO<!>
+}
+
+enum class B {
+    FOO
+    
+    fun FOO() {}
+}
+
+enum class C {
+    <!REDECLARATION!>FOO<!>
+    
+    val <!REDECLARATION!>FOO<!> = 1
+}
+
+enum class D {
+    <!REDECLARATION!>FOO<!>
+    
+    class <!REDECLARATION!>FOO<!> {}
+}
+

compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -2245,6 +2245,11 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
                 doTest("compiler/testData/diagnostics/tests/redeclarations/kt2247.kt");
             }
             
+            @TestMetadata("kt2418.kt")
+            public void testKt2418() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/redeclarations/kt2418.kt");
+            }
+            
             @TestMetadata("kt2438.kt")
             public void testKt2438() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/redeclarations/kt2438.kt");