From 053e48a3684bb0dc70635e547a78d82294bdf773 2021-08-18 19:17:20
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2021-08-18 19:17:20
Subject: [PATCH] Protect against failure to show local data.

See https://github.com/napari/napari/pull/3201 where formatting
traceback was failing and lead to silenced errors.

With this change we  instead get the rest of the traceback but without
the local variables, which is still better.

---

diff --git a/IPython/core/ultratb.py b/IPython/core/ultratb.py
index beed8c0..cf022ee 100644
--- a/IPython/core/ultratb.py
+++ b/IPython/core/ultratb.py
@@ -634,8 +634,16 @@ class VerboseTB(TBTools):
         lvals = ''
         lvals_list = []
         if self.include_vars:
-            for var in frame_info.variables_in_executing_piece:
-                lvals_list.append(tpl_name_val % (var.name, repr(var.value)))
+            try:
+                # we likely want to fix stackdata at some point, but
+                # still need a workaround.
+                fibp = frame_info.variables_in_executing_piece
+                for var in fibp:
+                    lvals_list.append(tpl_name_val % (var.name, repr(var.value)))
+            except Exception:
+                lvals_list.append(
+                    "Exception trying to inspect frame. No more locals available."
+                )
         if lvals_list:
             lvals = '%s%s' % (indent, em_normal.join(lvals_list))