From 92027083ab69186db3f104fe38651086bcf4e760 2023-03-30 08:25:59
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2023-03-30 08:25:59
Subject: [PATCH] Handle OSError cases where traceback frames occur from built files (#13964)


 I've been using the `_render_traceback_` method of the traceback object, provided by the
`IPython.core.interactiveshell.InteractiveShell` object that you
created, in the `showtraceback` method. Thanks to this, I was able to
create better error messages. I appreciate it. The following issue is
related to the use of this method.
```python
                    try:
                        # Exception classes can customise their traceback - we
                        # use this in IPython.parallel for exceptions occurring
                        # in the engines. This should return a list of strings.
                        if hasattr(value, "_render_traceback_"):
                            stb = value._render_traceback_()
                        else:
                            stb = self.InteractiveTB.structured_traceback(
                                etype, value, tb, tb_offset=tb_offset
                            )
```


I noticed that in the recent `8.11` version, code was added to generate
a traceback when the source code is too long. In this case, if the
`etb.tb_frame` object is a built file or something similar, the
`inspect.getsourcelines(etb.tb_frame)` method may raise an error. So I
implemented a change to set the `max_len` to the minimum value and avoid
the following condition when an `OSError` occurs. I think this approach
can handle cases where errors occur while using the
`inspect.getsourcelines()` method.

If there is anything I have done wrong or any procedures I should
follow, please let me know. I would greatly appreciate it if you could
leave a comment and I will make the necessary changes immediately. Thank
you.
---

diff --git a/IPython/core/ultratb.py b/IPython/core/ultratb.py
index 009268f..c0a801c 100644
--- a/IPython/core/ultratb.py
+++ b/IPython/core/ultratb.py
@@ -1017,8 +1017,12 @@ class VerboseTB(TBTools):
         max_len = 0
         tbs = []
         while cf is not None:
-            source_file = inspect.getsourcefile(etb.tb_frame)
-            lines, first = inspect.getsourcelines(etb.tb_frame)
+            try:
+                source_file = inspect.getsourcefile(etb.tb_frame)
+                lines, first = inspect.getsourcelines(etb.tb_frame)
+            except OSError:
+                max_len = float("-inf")
+                break
             max_len = max(max_len, first + len(lines))
             tbs.append(cf)
             cf = cf.tb_next