From 12b19a1d76e1a6f80923c8358290d605dacd65d4 Mon Sep 17 00:00:00 2001
From: Mariusz Felisiak <felisiak.mariusz@gmail.com>
Date: Wed, 26 May 2021 11:19:47 +0200
Subject: [PATCH] Fixed #32783 -- Fixed crash of autoreloader when __main__
 module doesn't have __spec__ attribute.

Regression in ec6d2531c59466924b645f314ac33f54470d7ac3.

Thanks JonathanNickelson for the report.
---
 django/utils/autoreload.py           |  3 ++-
 docs/releases/3.2.4.txt              |  3 +++
 tests/utils_tests/test_autoreload.py | 11 +++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/django/utils/autoreload.py b/django/utils/autoreload.py
index 9bd2cff066..b6af5f5491 100644
--- a/django/utils/autoreload.py
+++ b/django/utils/autoreload.py
@@ -222,7 +222,8 @@ def get_child_arguments():
     args = [sys.executable] + ['-W%s' % o for o in sys.warnoptions]
     # __spec__ is set when the server was started with the `-m` option,
     # see https://docs.python.org/3/reference/import.html#main-spec
-    if __main__.__spec__ is not None and __main__.__spec__.parent:
+    # __spec__ may not exist, e.g. when running in a Conda env.
+    if getattr(__main__, '__spec__', None) is not None and __main__.__spec__.parent:
         args += ['-m', __main__.__spec__.parent]
         args += sys.argv[1:]
     elif not py_script.exists():
diff --git a/docs/releases/3.2.4.txt b/docs/releases/3.2.4.txt
index 63e5096334..9941bd7513 100644
--- a/docs/releases/3.2.4.txt
+++ b/docs/releases/3.2.4.txt
@@ -25,3 +25,6 @@ Bugfixes
   
 * Fixed a bug in Django 3.2 that would trigger the auto-reloader for template
   changes when directory paths were specified with strings (:ticket:`32744`).
+
+* Fixed a regression in Django 3.2 that caused a crash of auto-reloader with
+  ``AttributeError``, e.g. inside a ``Conda`` environment (:ticket:`32783`).
diff --git a/tests/utils_tests/test_autoreload.py b/tests/utils_tests/test_autoreload.py
index a0af1e9fa9..7b91686bf5 100644
--- a/tests/utils_tests/test_autoreload.py
+++ b/tests/utils_tests/test_autoreload.py
@@ -219,6 +219,17 @@ class TestChildArguments(SimpleTestCase):
         with self.assertRaisesMessage(RuntimeError, msg):
             autoreload.get_child_arguments()
 
+    @mock.patch('sys.argv', [__file__, 'runserver'])
+    @mock.patch('sys.warnoptions', [])
+    def test_module_no_spec(self):
+        module = types.ModuleType('test_module')
+        del module.__spec__
+        with mock.patch.dict(sys.modules, {'__main__': module}):
+            self.assertEqual(
+                autoreload.get_child_arguments(),
+                [sys.executable, __file__, 'runserver']
+            )
+
 
 class TestUtilities(SimpleTestCase):
     def test_is_django_module(self):