Fix memory leaks, aligned allocators
diff --git a/src/lisp/compiler.h b/src/lisp/compiler.h
index 16cc35e..d70cac6 100644
--- a/src/lisp/compiler.h
+++ b/src/lisp/compiler.h
@@ -119,6 +119,18 @@
void local_free(struct local *local, unsigned int slot);
/**
+ * Deletes the memory allocated in `local`. Does not actually call `free()` on
+ * `local` itself, but frees the variables and stack slots associated with it.
+ */
+void del_local(struct local *local);
+
+/**
+ * Deletes the memory allocated in `env`. Does not actually call `free()` on
+ * `env` itself.
+ */
+void del_env(struct environment *env);
+
+/**
* Walk `body` and reserve space in `local` for any variable declarations.
*/
void walk_and_alloc(struct local *local, value_t body);