From 24ab7995f507e4f25e3d793908458f7231050b98 Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Mon, 6 Jan 2020 05:21:36 +0100
Subject: [PATCH] bpo-39228: traceback.FrameSummary: handle error via repr

---
 Lib/traceback.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Lib/traceback.py b/Lib/traceback.py
index 7a4c8e19f98..c13de709de2 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -257,7 +257,17 @@ class FrameSummary:
         self._line = line
         if lookup_line:
             self.line
-        self.locals = {k: repr(v) for k, v in locals.items()} if locals else None
+        if locals:
+            self.locals = {}
+            for k, v in locals.items():
+                try:
+                    self.locals[k] = repr(v)
+                except (KeyboardInterrupt, SystemExit):
+                    raise
+                except BaseException as exc:
+                    self.locals[k] = f"<unrepresentable repr ({exc})>"
+        else:
+            self.locals = None
 
     def __eq__(self, other):
         if isinstance(other, FrameSummary):