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bug#359: Inferior Python hangs at startup


From: Otto Maddox
Subject: bug#359: Inferior Python hangs at startup
Date: Fri, 06 Jun 2008 01:32:59 +0100

The problem occurs for Emacs 22.2 on Mac OS X 10.5 (Leopard), whether compiled 
for Carbon or just for the console.  I haven't tried an X build.  Precisely, to 
reproduce:

$ emacs -Q -nw
M-x run-python RET

and that's it.

It doesn't happen for Emacs 22.2 on my Mac OS X 10.4 (Tiger) machine, which has 
a different Python build, btw:

Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

Any tips for debugging this problem?  I'm keen to see it fixed because it's a 
bit of a showstopper for me.


On Thu, 05 Jun 2008 10:21:22 -0400, "Stefan Monnier" <address@hidden> said:
> > M-x run-python RET
> > Python 2.5.1 (r251:54863, Jan 17 2008, 19:35:17) 
> > [GCC 4.0.1 (Apple Inc. build 5465)] on darwin
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> import emacs; print '_emacs_out ()
> 
> > and the inferior Python buffer hangs.
> 
> I cannot reporduce it.  I did:
> 
>   % emacs/22/src/emacs -Q
> 
> then
> 
>   M-x run-python RET
> 
> which resulted in a *Python* buffer containing just
> 
>    Python 2.5.2 (r252:60911, May 28 2008, 08:35:32) 
>    [GCC 4.2.4 (Debian 4.2.4-1)] on linux2
>    Type "help", "copyright", "credits" or "license" for more information.
>    >>> 
> 
> I then typed something at that prompt and it worked fine.  I even tried
> to type "import emacs; print '_emacs_out ()" and it correctly signalled
> an error:
> 
>    Python 2.5.2 (r252:60911, May 28 2008, 08:35:32) 
>    [GCC 4.2.4 (Debian 4.2.4-1)] on linux2
>    Type "help", "copyright", "credits" or "license" for more information.
>    >>> print 1
>    1
>    >>> import emacs; print '_emacs_out ()
>      File "<stdin>", line 1
>        import emacs; print '_emacs_out ()
>                                         ^
>    SyntaxError: EOL while scanning single-quoted string
>    >>> print 1
>    1
>    >>> 
> 
> Can you try and come up with a more precise recipe to reproduce
> your problem?  Or maybe it's specific to your build (I see you're
> apparently running under macosx, is that an X11 build?  A Carbon
> build?).
> 
> 
>         Stefan
-- 
  Otto Maddox
  address@hidden

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