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Passing a single directory as a command line argument can make IDLE hang.
To achieve this the user needs to configure IDLE to open an editor
window by default.
The attached patch discards filenames that failed to load, so in the end
it may open an empty editor window instead of hanging.

Idle has changed a bit since the initial message, so it no longer hangs
when it is configured to open an edit window by default, but now it
hangs when running it as: idle -e <somedirnamehere> (which the patch fixes).

Please refer to msg89022.

I can confirm that using "idle -e <dir>" still causes a hang on Windows using 3.2.2 and on Ubuntu using 2.7.1 and 3.2
The given patch fixes the problem on those platforms.

New changeset 01404295138d by Andrew Svetlov in branch 'default':
#3573: idle now doesn't hungs if launched as: idle -e <directory>
http://hg.python.org/cpython/rev/01404295138d 

Fixed. Thanks to Guilherme Polo and Roger Serwy.

New changeset a95b19b3b4cd by Andrew Svetlov in branch '3.2':
#3573: idle now doesn't hungs if launched as: idle -e <directory>
http://hg.python.org/cpython/rev/a95b19b3b4cd
New changeset cdcd1f7f0882 by Andrew Svetlov in branch 'default':
Merge from 3.2 for issue #3573, fix Misc/NEWS as Ned Deily guess.
http://hg.python.org/cpython/rev/cdcd1f7f0882 

New changeset a9be863e5734 by Andrew Svetlov in branch '2.7':
#3573: idle now doesn't hungs if launched as: idle -e <directory>
http://hg.python.org/cpython/rev/a9be863e5734 

Backported to 3.2 and 2.7

Thanks for applying.
Just note that unlike with svn, with hg it is stronly recommended to apply to 3.2 first and forward port to 3.3. Something about the DAGs working better.

Will do in next time.
Thank you for instructions.

3-22 00:26
> with hg it is stronly recommended to apply to 3.2 first and forward port to 3.3.
> Something about the DAGs working better.
The default branch (3.3) is a superset of 3.2: all bug fixes are in both branches, and new features are in 3.3 only. We’ve chosen the simplest way to achieve that with Mercurial: we commit to 3.2 and merge into default. This ensures that no fix committed to one version is forgotten in the other, and also automates the file merging. That’s just it.

(Edited for typos, ignore the "3-22 00:26" that comes from I don’t know where)