From 430e364db7baf5494d1bdfe077154edc4dbd6b71 Mon Sep 17 00:00:00 2001
From: Simon Cozens <simon@simon-cozens.org>
Date: Tue, 19 Mar 2024 22:33:22 +0000
Subject: [PATCH] Compile aux fields

---
 Lib/fontTools/ttLib/tables/otConverters.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lib/fontTools/ttLib/tables/otConverters.py b/Lib/fontTools/ttLib/tables/otConverters.py
index afe4e538f..a2f672567 100644
--- a/Lib/fontTools/ttLib/tables/otConverters.py
+++ b/Lib/fontTools/ttLib/tables/otConverters.py
@@ -153,6 +153,8 @@ class BaseConverter(object):
         self.name = name
         self.repeat = repeat
         self.aux = aux
+        if self.aux and not self.repeat:
+            self.aux = compile(self.aux, "<string>", "eval")
         self.tableClass = tableClass
         self.isCount = name.endswith("Count") or name in [
             "DesignAxisRecordSize",