From adc9c32514c94065e179ddd9c5480ab72b390b2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20Ke=C3=9Fler?= <git@maximilian-kessler.de>
Date: Mon, 31 Jan 2022 19:59:52 +0100
Subject: [PATCH] write cache version of aux file into aux file

---
 src/environments/groupthm/groupthm.dtx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/environments/groupthm/groupthm.dtx b/src/environments/groupthm/groupthm.dtx
index 783875b..14b8f09 100644
--- a/src/environments/groupthm/groupthm.dtx
+++ b/src/environments/groupthm/groupthm.dtx
@@ -2709,6 +2709,13 @@
 \hook_gput_code:nnn { enddocument / afterlastpage } { groupthm }
   {
     \let \declaretheorem \@@_fake_declare_theorem:w
+    \iow_now:cx { @auxout }
+      {
+        \token_to_str:N \ExplSyntaxOn
+        \int_set:Nn \g_@@_cache_version_aux_int
+          { \int_use:N \g_@@_cache_version_document_int }
+        \token_to_str:N \ExplSyntaxOff
+      }
   }
 %    \end{macrocode}
 %