Clinic: Add warning for untested (and unused in CPython!) format units.

diff --git a/Tools/clinic/clinic.py b/Tools/clinic/clinic.py
index 3c40e065504700cf3992b63aab15140306aee6ca..cac90e1bdb90f38c6073b6712e4624ea2a4ea41a 100755 (executable)
--- a/Tools/clinic/clinic.py
+++ b/Tools/clinic/clinic.py
@@ -1656,6 +1656,7 @@ class str_converter(CConverter):
                 format_unit = 'et#'
 
             if format_unit.endswith('#'):
+                print("Warning: code using format unit ", repr(format_unit), "probably doesn't work properly.")
                 # TODO set pointer to NULL
                 # TODO add cleanup for buffer
                 pass