Do not fail when delegating to an (unsupported) dynamic type on the JVM

compiler/backend-common/src/org/jetbrains/jet/backend/common/CodegenUtilKt.kt

@@ -25,7 +25,7 @@ import org.jetbrains.jet.utils.keysToMapExceptNulls
 import org.jetbrains.jet.lang.resolve.DescriptorUtils
 import org.jetbrains.jet.lang.resolve.MemberComparator
 import java.util.Comparator
-import org.jetbrains.jet.lang.resolve.scopes.JetScope
+import org.jetbrains.jet.lang.types.isDynamic
 
 public object CodegenUtilKt {
 
@@ -39,6 +39,7 @@ public object CodegenUtilKt {
             toTrait: ClassDescriptor,
             delegateExpressionType: JetType? = null
     ): Map<CallableMemberDescriptor, CallableDescriptor> {
+        if (delegateExpressionType?.isDynamic() ?: false) return mapOf();
 
         return descriptor.getDefaultType().getMemberScope().getDescriptors().stream()
             .filterIsInstance(javaClass<CallableMemberDescriptor>())