diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3dc402a..84ec579 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,7 @@ macro(compile_options target_name)
     sanitizers(${target_name})
 endmacro()
 
-project(blt-gp VERSION 0.3.23)
+project(blt-gp VERSION 0.3.24)
 
 include(CTest)
 
diff --git a/src/transformers.cpp b/src/transformers.cpp
index 48c50ff..dba6549 100644
--- a/src/transformers.cpp
+++ b/src/transformers.cpp
@@ -404,6 +404,11 @@ namespace blt::gp
                     thread_local tree_t child_tree{program};
 
                     c.copy_subtree(tree_t::subtree_point_t(child.start), child.end, child_tree);
+                    if (!child_tree.check(detail::debug::context_ptr))
+                    {
+                        child_tree.print(std::cout, false, true);
+                        BLT_ABORT("We found an error");
+                    }
                     c.delete_subtree(tree_t::subtree_point_t(static_cast<ptrdiff_t>(c_node)));
                     c.insert_subtree(tree_t::subtree_point_t(static_cast<ptrdiff_t>(c_node)), child_tree);
                     child_tree.clear(program);