Don't search Object from BasicObject children

The final Object search should not be done when the target class
descends from BasicObject instead of Object. We test this by
checking its allocator against the default RubyBasicObject
allocator.

Author: headius

core/src/main/java/org/jruby/RubyModule.java

@@ -4835,8 +4835,11 @@ public IRubyObject getConstantNoConstMissingSKipAutoload(String name) {
     private IRubyObject getConstantSkipAutoload(String name, boolean inherit, boolean searchObject, boolean inheritObject) {
         IRubyObject constant = iterateConstantNoConstMissing(name, this, inherit, false, inheritObject);
 
-        if (constant == null && searchObject) {
-            constant = iterateConstantNoConstMissing(name, getRuntime().getObject(), inherit, false, true);
+        Ruby runtime = getRuntime();
+
+        // only search object if specified and this module is a class and does not extend from BasicObject
+        if (constant == null && searchObject && (!(this instanceof RubyClass) || ((RubyClass) this).getAllocator() != BASICOBJECT_ALLOCATOR)) {
+            constant = iterateConstantNoConstMissing(name, runtime.getObject(), inherit, false, true);
         }
 
         return constant;