#21049 closed Bug (fixed)
RuntimeError when running ./manage.py runserver
Reported by: | Owned by: | mburst | |
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Component: | Python 3 | Version: | 1.6-beta-1 |
Severity: | Normal | Keywords: | |
Cc: | Triage Stage: | Accepted | |
Has patch: | yes | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | yes | UI/UX: | no |
Description
This happened to me when I tried to "./manage.py runserver":
$ ./manage.py runserver Validating models... Traceback (most recent call last): File "./manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/home/vella/projetos/chroni9/venv/site-packages/django/core/management/__init__.py", line 397, in execute_from_command_line utility.execute() File "/home/vella/projetos/chroni9/venv/site-packages/django/core/management/__init__.py", line 390, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/home/vella/projetos/chroni9/venv/site-packages/django/core/management/base.py", line 240, in run_from_argv self.execute(*args, **options.__dict__) File "/home/vella/projetos/chroni9/venv/site-packages/django/core/management/base.py", line 283, in execute output = self.handle(*args, **options) File "/home/vella/projetos/chroni9/venv/site-packages/django/core/management/commands/runserver.py", line 75, in handle self.run(*args, **options) File "/home/vella/projetos/chroni9/venv/site-packages/django/core/management/commands/runserver.py", line 84, in run autoreload.main(self.inner_run, args, options) File "/home/vella/projetos/chroni9/venv/site-packages/django/utils/autoreload.py", line 181, in main reloader(wrapped_main_func, args, kwargs) File "/home/vella/projetos/chroni9/venv/site-packages/django/utils/autoreload.py", line 148, in python_reloader reloader_thread() File "/home/vella/projetos/chroni9/venv/site-packages/django/utils/autoreload.py", line 129, in reloader_thread if code_changed(): File "/home/vella/projetos/chroni9/venv/site-packages/django/utils/autoreload.py", line 60, in code_changed for m in sys.modules.values(): RuntimeError: dictionary changed size during iteration
I am using Django 1.6b2, with the totally experimental Python 3 implementation from PyPy 2.1, so I can not be sure if this really is a Django Python 3 issue, just PyPy issue, or PyPy Python 3 issue.
It happened only once, just now, and I was unable to reproduce. I am using SQLite, if that matters...
Change History (8)
comment:1 by , 11 years ago
Easy pickings: | set |
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Triage Stage: | Unreviewed → Accepted |
comment:2 by , 11 years ago
Owner: | changed from | to
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Status: | new → assigned |
comment:3 by , 11 years ago
The pull request for this ticket is here https://github.com/django/django/pull/1575
comment:4 by , 11 years ago
Has patch: | set |
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comment:5 by , 11 years ago
Resolution: | → fixed |
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Status: | assigned → closed |
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Right, in Python 3
values()
returns a dictionary view (http://docs.python.org/3/library/stdtypes.html#dictionary-view-objects), not a copy of the values as in Python 2. Probably wrappingsys.modules.values()
insidelist()
would be sufficient to ensure thread-safety.