Fixed #19665 -- Ensured proper stderr output for Command.run_from_argv

Thanks Stefan Koegl for the report and Simon Charette for the review.

1 files changed, 5 insertions, 2 deletions

diff --git a/django/core/management/base.py b/django/core/management/base.py
index 895753ea12..7b9001ed14 100644
--- a/django/core/management/base.py
+++ b/django/core/management/base.py
@@ -221,9 +221,12 @@ class BaseCommand(object):
         try:
             self.execute(*args, **options.__dict__)
         except Exception as e:
+            # self.stderr is not guaranteed to be set here
+            stderr = getattr(self, 'stderr', OutputWrapper(sys.stderr, self.style.ERROR))
             if options.traceback:
-                self.stderr.write(traceback.format_exc())
-            self.stderr.write('%s: %s' % (e.__class__.__name__, e))
+                stderr.write(traceback.format_exc())
+            else:
+                stderr.write('%s: %s' % (e.__class__.__name__, e))
             sys.exit(1)
 
     def execute(self, *args, **options):