From 3d4e60f2835e4d85fd357c182656d3eca534f2ff Mon Sep 17 00:00:00 2001
From: Stefan Behnel <stefan_ml@behnel.de>
Date: Fri, 3 Mar 2023 09:15:38 +0100
Subject: Prevent lxml.objectify from accepting non-decimal digit characters as
 integers/numbers and from representing them as IntElement.

---
 src/lxml/objectify.pyx           | 2 +-
 src/lxml/tests/test_objectify.py | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lxml/objectify.pyx b/src/lxml/objectify.pyx
index 376695a8..791f2cf8 100644
--- a/src/lxml/objectify.pyx
+++ b/src/lxml/objectify.pyx
@@ -976,7 +976,7 @@ cdef _checkNumber(bytes_unicode s, bint allow_float):
     cdef NumberParserState state = NPS_SPACE_PRE
 
     for c in s:
-        if c.isdigit() if (bytes_unicode is unicode) else c in b'0123456789':
+        if c in u'0123456789':
             if state in (NPS_DIGITS, NPS_FRACTION, NPS_DIGITS_EXP):
                 pass
             elif state in (NPS_SPACE_PRE, NPS_SIGN):
diff --git a/src/lxml/tests/test_objectify.py b/src/lxml/tests/test_objectify.py
index f50a3447..a62df852 100644
--- a/src/lxml/tests/test_objectify.py
+++ b/src/lxml/tests/test_objectify.py
@@ -2663,6 +2663,7 @@ class ObjectifyTestCase(HelperTestCase):
           <s>t</s>
           <s>f</s>
           <s></s>
+          <s>²²²²</s>
           <s>12_34</s>
           <s>1.2_34</s>
           <s>34E</s>
-- 
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