Don't add delegated members from error types

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

@@ -129,7 +129,7 @@ public final class DelegationResolver<T extends CallableMemberDescriptor> {
                 continue;
             }
             JetType delegatedTraitType = typeResolver.resolve(typeReference);
-            if (delegatedTraitType == null) {
+            if (delegatedTraitType == null || delegatedTraitType.isError()) {
                 continue;
             }
             Collection<T> delegatesForTrait = generateDelegatesForTrait(delegatedMembers, delegatedTraitType);

compiler/testData/diagnostics/tests/override/MissingDelegate.kt

@@ -0,0 +1,3 @@
+class C : <!UNRESOLVED_REFERENCE, DELEGATION_NOT_TO_TRAIT!>Base1<!> by <!UNRESOLVED_REFERENCE!>Base2<!>(1) {
+  fun test() { }
+}

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

@@ -5331,6 +5331,11 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                 doTest("compiler/testData/diagnostics/tests/override/kt880.kt");
             }
             
+            @TestMetadata("MissingDelegate.kt")
+            public void testMissingDelegate() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/override/MissingDelegate.kt");
+            }
+            
             @TestMetadata("MultipleDefaultParametersInSupertypes.kt")
             public void testMultipleDefaultParametersInSupertypes() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/override/MultipleDefaultParametersInSupertypes.kt");