Issue #9948: logging: fixed problem of losing filename case information.

Lib/logging/__init__.py

@@ -1174,7 +1174,7 @@ class Logger(Filterer):
             if filename == _srcfile:
                 f = f.f_back
                 continue
-            rv = (filename, f.f_lineno, co.co_name)
+            rv = (co.co_filename, f.f_lineno, co.co_name)
             break
         return rv
 

Misc/NEWS

@@ -92,6 +92,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #9948: Fixed problem of losing filename case information.
+
 - Issue #9437: Fix building C extensions with non-default LDFLAGS.
 
 - Issue #4661: email can now parse bytes input and generate either converted