From 6bb3dc2a57ff07b5355642ba11f5db15587c540c Mon Sep 17 00:00:00 2001
From: Daniel Kolesa <daniel@octaforge.org>
Date: Thu, 1 Apr 2021 03:54:34 +0200
Subject: [PATCH] avoid recompiling code when undo/redoing arguments

---
 src/cs_ident.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/cs_ident.cc b/src/cs_ident.cc
index 8a504fc..3a59b0c 100644
--- a/src/cs_ident.cc
+++ b/src/cs_ident.cc
@@ -132,6 +132,9 @@ void alias_impl::pop_arg() {
 }
 
 void alias_impl::undo_arg(ident_stack &st) {
+    if (p_acode) {
+        st.val_s.set_code(p_acode);
+    }
     st.next = p_astack;
     p_astack = p_astack->next;
     clean_code();
@@ -140,6 +143,10 @@ void alias_impl::undo_arg(ident_stack &st) {
 void alias_impl::redo_arg(ident_stack &st) {
     p_astack = st.next;
     clean_code();
+    p_acode = st.val_s.get_code();
+    if (p_acode) {
+        bcode_incr(p_acode->get_raw());
+    }
 }
 
 void alias_impl::set_arg(thread_state &ts, any_value &v) {