--- a/cutils/treesum.py	Mon May 12 09:40:33 2025 +0200
+++ b/cutils/treesum.py	Mon May 12 09:48:23 2025 +0200
@@ -1694,7 +1694,7 @@
     """
 
     PATTERNC = re.compile(br"\A\s*[#;].*\r?\n\Z")  # comments, no CRC
-    PATTERN0 = re.compile(br"\A[ \t]*\r?\n\Z")     # empty lines
+    PATTERNE = re.compile(br"\A[ \t]*\r?\n\Z")     # empty lines
     PATTERN1 = re.compile(br"\A(VERSION|FSENCODING|FLAGS|TIMESTAMP|ISOTIMESTAMP|CRC32)[ \t]*=[ \t]*([^ \t]+)[ \t]*\r?\n\Z")      # noqa: E501  line too long
     PATTERN2 = re.compile(br"\A(ROOT|COMMENT|ERROR|GENERATOR|FNMATCH|ACCEPT-TREESUM)[ \t]*\((.*)\)[ \t]*\r?\n\Z")                                       # noqa: E501  line too long
     PATTERN3 = re.compile(br"\ASIZE[ \t]*\((.*)\)([ \t]*=[ \t]*([0-9., '_]*[0-9]))?[ \t]*\r?\n\Z")                                               # noqa: E501  line too long
@@ -1778,7 +1778,7 @@
             # Skip comments and do NOT update CRC for comment lines
             if self.PATTERNC.search(line):
                 continue
-            if not self.PATTERN0.search(line):
+            if not self.PATTERNE.search(line):
                 break
             # Empty lines count for CRC
             self._update_crc(line)