M src/error.c → src/error.c

@@ -98,7 +98,8 @@ 
     for (size_t i = 0; i < ctx->stack_trace->size; i++)
     {
         int index = (ctx->stack_trace->start + ctx->stack_trace->size - 1 - i) % HEX_STACK_TRACE_SIZE;
-        hex_token_t token = *ctx->stack_trace->entries[index];
-        fprintf(stderr, "  %s (%s:%d:%d)\n", token.value, token.position->filename, token.position->line, token.position->column);
+        hex_token_t *token = malloc(sizeof(hex_token_t));
+        token = ctx->stack_trace->entries[index];
+        fprintf(stderr, "  %s (%s:%d:%d)\n", token->value, token->position->filename, token->position->line, token->position->column);
     }
 }

M src/stack.c → src/stack.c

@@ -207,16 +207,17 @@ 
 // Pop function
 hex_item_t *hex_pop(hex_context_t *ctx)
 {
-    if (ctx->stack->top < 0)
-    {
-        hex_error(ctx, "[pop] Insufficient items on the stack");
-        return NULL;
-    }
     hex_item_t *item = malloc(sizeof(hex_item_t));
     if (item == NULL)
     {
         hex_error(ctx, "[pop] Failed to allocate memory for item");
         return NULL;
+    }
+    if (ctx->stack->top < 0)
+    {
+        hex_error(ctx, "[pop] Insufficient items on the stack");
+        item->type = HEX_TYPE_INVALID;
+        return item;
     }
     *item = *ctx->stack->entries[ctx->stack->top];
     hex_debug_item(ctx, " POP", item);