Ned Deily <n...@acm.org> added the comment:

I took a quick look at this. It's not just OS X, the following also fails on 
FreeBSD 8.2:

$ python2.7 -c 'import readline'
$ 
$ python2.7 -c 'import readline' &
$ 
[1] + Stopped (tty output)    python2.7 -c ?import readline

It seems to be hanging on a read from stdin, as adding a redirect of stdin to 
/dev/null prevents the hang:

$ python2.7 -c 'import readline' </dev/null &
[1] 36178
$ 
[1]+  Done                    python2.7 -c 'import readline' < /dev/null

But, on Debian and Ubuntu, neither case hangs. Also, on OS X, the same hang 
behavior is observed when linked with either GNU readline or BSD libedit.  I'm 
not sure what the significant difference here is: possibly a BSDism vs Linuxism?

----------
components:  -Macintosh
nosy: +ned.deily
title: 'import readline' fails when launching with '&' -> 'import readline' 
hangs when launching with '&' on BSD and OS X
type: crash -> behavior
versions: +Python 3.2, Python 3.3 -Python 2.6

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<http://bugs.python.org/issue14892>
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