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| -rw-r--r-- | django/utils/autoreload.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/django/utils/autoreload.py b/django/utils/autoreload.py index 119bebb148..3e38ef0ff1 100644 --- a/django/utils/autoreload.py +++ b/django/utils/autoreload.py @@ -81,6 +81,9 @@ def gen_filenames(): Yields a generator over filenames referenced in sys.modules and translation files. """ + # N.B. ``list(...)`` is needed, because this runs in parallel with + # application code which might be mutating ``sys.modules``, and this will + # fail with RuntimeError: cannot mutate dictionary while iterating filenames = [filename.__file__ for filename in list(sys.modules.values()) if hasattr(filename, '__file__')] |