commit 5df35faf3611b459f7f32bfe9fd2ffa7fb2dc59e
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Sat Oct 16 10:51:05 2021 -0700
committer GitHub <noreply@github.com> Sat Oct 16 10:51:05 2021 -0700
tree 0e71b2c3918b37152ee28f0f1a020c4f9ad94ec7
parent 855d6247adb39d4e38b698b89e519587318abd80

bpo-45249: Fix caret location when end_offset is set to 0 (GH-28855)

(cherry picked from commit fe0d9e22a52a10c4cbe52254b51f2d4e74d83568)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>

Lib/traceback.py

diff --git a/Lib/traceback.py b/Lib/traceback.py
index c7947f1..901b994 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -633,7 +633,7 @@ def _format_syntax_error(self, stype):
 
             if self.offset is not None:
                 offset = self.offset
-                end_offset = self.end_offset if self.end_offset is not None else offset
+                end_offset = self.end_offset if self.end_offset not in {None, 0} else offset
                 if offset == end_offset or end_offset == -1:
                     end_offset = offset + 1