commit 7a98e302c37781f9c6448a28bc70bff18b7e2862
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Fri Oct 12 04:07:01 2018 -0700
committer Berker Peksag <berker.peksag@gmail.com> Fri Oct 12 14:07:01 2018 +0300
tree 4a307e7ba7692ab7b07ae678481959f5c73e4d80
parent c327a5499fa823f627366c17e20687065fd70449

bpo-34900: Make TestCase.debug() work with subtests (GH-9707)

(cherry picked from commit da2bf9f66d0c95b988c5d87646d168f65499b316)

Co-authored-by: Bruno Oliveira <nicoddemus@gmail.com>

Lib/unittest/case.py

diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
index c0170d1..758924d 100644
--- a/Lib/unittest/case.py
+++ b/Lib/unittest/case.py
@@ -519,7 +519,7 @@
         case as failed but resumes execution at the end of the enclosed
         block, allowing further test code to be executed.
         """
-        if not self._outcome.result_supports_subtests:
+        if self._outcome is None or not self._outcome.result_supports_subtests:
             yield
             return
         parent = self._subtest