:bug: Fix cpy_type_decl

diff --git a/ast b/ast
index 0835f9740272e180bc609e82a3c0f80218814be0..349c5989c2944b16cfee39538ca74312afdf56fe 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 0835f9740272e180bc609e82a3c0f80218814be0
+Subproject commit 349c5989c2944b16cfee39538ca74312afdf56fe