RBA inspector does not crash on unknown class

src/rba/rba/rbaInspector.cc

@@ -338,7 +338,7 @@ public:
     : m_obj (obj), mp_cls (0), m_members (Qnil)
   {
     rb_gc_register_address (&m_obj);
-    mp_cls = find_cclass (rb_class_of (m_obj));
+    mp_cls = find_cclass_maybe_null (rb_class_of (m_obj));
     m_members = rb_obj_instance_variables (m_obj);
     rb_gc_register_address (&m_members);
 

src/rba/rba/rbaInternal.cc

@@ -940,6 +940,13 @@ bool is_registered (const gsi::ClassBase *cls)
 }
 
 const gsi::ClassBase *find_cclass (VALUE k)
+{
+  const gsi::ClassBase *cls = find_cclass_maybe_null (k);
+  tl_assert (cls != 0);
+  return cls;
+}
+
+const gsi::ClassBase *find_cclass_maybe_null (VALUE k)
 {
   std::map <VALUE, const gsi::ClassBase *>::const_iterator cls;
 
@@ -954,8 +961,7 @@ const gsi::ClassBase *find_cclass (VALUE k)
     }
   }
 
-  tl_assert (cls != cls_map.end ());
-  return cls->second;
+  return cls != cls_map.end () ? cls->second : 0;
 }
 
 }

src/rba/rba/rbaInternal.h

@@ -218,6 +218,11 @@ void register_class (VALUE ruby_cls, const gsi::ClassBase *gsi_cls);
  */
 const gsi::ClassBase *find_cclass (VALUE k);
 
+/**
+ *  @brief Find the class declaration from the Ruby object
+ */
+const gsi::ClassBase *find_cclass_maybe_null (VALUE k);
+
 /**
  *  @brief Finds the Ruby class for a gsi class
  */