Return error class in case we are not able to find class for object property

compiler/frontend/serialization/src/org/jetbrains/jet/descriptors/serialization/DescriptorDeserializer.java

@@ -28,6 +28,7 @@ import org.jetbrains.jet.lang.resolve.DescriptorUtils;
 import org.jetbrains.jet.lang.resolve.lazy.storage.StorageManager;
 import org.jetbrains.jet.lang.resolve.name.FqNameUnsafe;
 import org.jetbrains.jet.lang.resolve.name.Name;
+import org.jetbrains.jet.lang.types.ErrorUtils;
 import org.jetbrains.jet.lang.types.Variance;
 
 import java.util.ArrayList;
@@ -201,8 +202,11 @@ public class DescriptorDeserializer {
             FqNameUnsafe fqName = DescriptorUtils.getFQName(containingDeclaration).child(name);
             ClassId objectId = ClassId.fromFqNameAndContainingDeclaration(fqName, (ClassOrNamespaceDescriptor) containingDeclaration);
             ClassDescriptor objectClass = typeDeserializer.getDescriptorFinder().findClass(objectId);
-            assert objectClass != null : "Object for property not found: " + name;
-
+            if (objectClass == null) {
+                // if we are not able to find the class for object property
+                // then something bad has happened since they should be in the same jar
+                objectClass = ErrorUtils.createErrorClass(objectId.asSingleFqName().asString());
+            }
             return new PropertyDescriptorForObjectImpl(containingDeclaration, annotations, visibility, name, objectClass);
         }
 

compiler/testData/compileKotlinAgainstBinariesCustom/brokenJarWithNoClassForObjectProperty/brokenJarWithNoClassForObjectProperty.kt

@@ -0,0 +1 @@
+package test

compiler/tests/org/jetbrains/jet/jvm/compiler/CompileKotlinAgainstBinariesCustomTest.java

@@ -43,4 +43,17 @@ public final class CompileKotlinAgainstBinariesCustomTest extends AbstractCompil
             Assert.assertFalse("Object property should have valid class", ErrorUtils.isError(((VariableDescriptorForObject) descriptor).getObjectClass()));
         }
     }
+
+    public void testBrokenJarWithNoClassForObjectProperty() throws Exception {
+        BindingContext context = analyzeFile(new File(
+                "compiler/testData/compileKotlinAgainstBinariesCustom/brokenJarWithNoClassForObjectProperty/brokenJarWithNoClassForObjectProperty.kt"));
+        NamespaceDescriptor namespaceDescriptor = context.get(FQNAME_TO_NAMESPACE_DESCRIPTOR, TEST_PACKAGE_FQNAME);
+        assert namespaceDescriptor != null;
+        Collection<DeclarationDescriptor> allDescriptors = namespaceDescriptor.getMemberScope().getAllDescriptors();
+        Assert.assertEquals(allDescriptors.size(), 1);
+        DeclarationDescriptor descriptor = allDescriptors.iterator().next();
+        Assert.assertTrue(descriptor.getName().asString().equals("Lol"));
+        Assert.assertTrue(descriptor instanceof VariableDescriptorForObject);
+        Assert.assertTrue("Object property should have an error class", ErrorUtils.isError(((VariableDescriptorForObject) descriptor).getObjectClass()));
+    }
 }