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python3's lib2to3 would fail in silence if python3 and its packages are installed as compiled .pyc files.
Root cause is in Lib/lib2to3/refactor.py, the function get_all_fix_names only searches '.py' fix names.
=========below is workaround=========
--- a/Lib/lib2to3/refactor.py
+++ b/Lib/lib2to3/refactor.py
@@ -37,6 +37,12 @@
 if remove_prefix:
 name = name[4:]
 fix_names.append(name[:-3])
+ if name.startswith("fix_") and name.endswith(".pyc"):
+ if remove_prefix:
+ name = name[4:]
+ name = name[:-4]
+ if name not in fix_names:
+ fix_names.append(name)
 return fix_names