Issue #17381: Fixed handling of case-insensitive ranges in regular expressions.
Added new opcode RANGE_IGNORE.
diff --git a/Modules/sre.h b/Modules/sre.h
index 35d198f..b632165 100644
--- a/Modules/sre.h
+++ b/Modules/sre.h
@@ -84,7 +84,7 @@
     /* current repeat context */
     SRE_REPEAT *repeat;
     /* hooks */
-    SRE_TOLOWER_HOOK lower;
+    SRE_TOLOWER_HOOK lower, upper;
 } SRE_STATE;
 
 typedef struct {