diff --git a/CMakeLists.txt b/CMakeLists.txt
index c972a4f..f056e7e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(blt-gp VERSION 0.0.30)
+project(blt-gp VERSION 0.0.31)
 
 option(ENABLE_ADDRSAN "Enable the address sanitizer" OFF)
 option(ENABLE_UBSAN "Enable the ub sanitizer" OFF)
diff --git a/include/blt/gp/program.h b/include/blt/gp/program.h
index 79d10db..8da47a3 100644
--- a/include/blt/gp/program.h
+++ b/include/blt/gp/program.h
@@ -83,7 +83,7 @@ namespace blt::gp
                 
                 if constexpr (sizeof...(Args) > 0)
                 {
-                    (add_non_context_argument<Args>(), ...);
+                    (add_non_context_argument<Args>(operator_id), ...);
                 }
                 
                 argc_t argc;
diff --git a/include/blt/gp/stack.h b/include/blt/gp/stack.h
index ce05dff..5d9f96d 100644
--- a/include/blt/gp/stack.h
+++ b/include/blt/gp/stack.h
@@ -41,6 +41,7 @@ namespace blt::gp
             template<typename T>
             void push(T&& value)
             {
+                static_assert(std::is_trivially_copyable_v<T> && "Type must be bitwise copyable!");
                 using NO_REF_T = std::remove_reference_t<T>;
                 auto ptr = allocate_bytes<T>();
                 head->metadata.offset = static_cast<blt::u8*>(ptr) + aligned_size<T>();
@@ -139,7 +140,26 @@ namespace blt::gp
             
             stack_allocator() = default;
             
-            stack_allocator(const stack_allocator& copy) = delete;
+            stack_allocator(const stack_allocator& copy)
+            {
+                head = nullptr;
+                block* list_itr = nullptr;
+                
+                // start at the beginning of the list
+                block* current = copy.head;
+                while (current != nullptr)
+                {
+                    list_itr = current;
+                    current = current->metadata.prev;
+                }
+                // copy all the blocks
+                while (list_itr != nullptr)
+                {
+                    push_block(list_itr->metadata.size);
+                    std::memcpy(head->buffer, list_itr->buffer, list_itr->storage_size());
+                    list_itr = list_itr->metadata.next;
+                }
+            }
             
             stack_allocator& operator=(const stack_allocator& copy) = delete;