Administriva and add a guard check

* Relax xdis version
* Check for None in frame more often
* Add more type annotations

Author: rocky

pyproject.toml

@@ -15,7 +15,7 @@ description = "GDB-like Python Debugger in the Trepan family"
 dependencies = [
     "columnize >= 0.3.10",
     "pyficache >= 2.5.0",
-    "xdis > 6.1.6,<6.2.1",
+    "xdis > 6.1.6,<6.3",
     "Pygments >= 2.2.0",
     "spark_parser >= 1.8.9, <1.9.2",
     "tracer > 1.9.0",

trepan/lib/core.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 #
-#   Copyright (C) 2008-2010, 2013-2016, 2020 2023-2024
+#   Copyright (C) 2008-2010, 2013-2016, 2020 2023-2025
 #   Rocky Bernstein <rocky@gnu.org>
 #
 #   This program is free software: you can redistribute it and/or modify
@@ -29,6 +29,7 @@
 import os.path as osp
 import sys
 import threading
+from types import FrameType
 from typing import Any, Dict, NewType, Optional
 
 # External packages
@@ -187,9 +188,11 @@ def canonic(self, filename):
 
         return canonic
 
-    def canonic_filename(self, frame):
+    def canonic_filename(self, frame: Optional[FrameType]) -> str:
         """Picks out the file name from `frame' and returns its
         canonic() value, a string."""
+        if frame is None:
+            return "?? - No frame"
         return self.canonic(frame.f_code.co_filename)
 
     def filename(self, filename=None):

trepan/lib/stack.py

@@ -64,7 +64,7 @@ def deparse_offset(_code, _name: str, _list_i: int, _) -> tuple:
 _with_local_varname = re.compile(r"_\[[0-9+]]")
 
 
-def count_frames(frame: FrameType, count_start=0):
+def count_frames(frame: FrameType, count_start=0) -> int:
     """Return a count of the number of frames"""
     count = -count_start
     for _ in range(1000):