From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jonathan Nieder <jrnieder@gmail.com>
Subject: Re: [PULL svn-fe] vcs-svn: simplifications, error handling
 improvements
Date: Sat, 26 Mar 2011 01:42:39 -0500
Message-ID: <20110326064220.GB20529@elie>
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To: Junio C Hamano <gitster@pobox.com>
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Junio C Hamano wrote:

> A bit more datapoint.  The first one works just fine, while the second one
> gets stuck:
>
>     $ cd t && make T=t0081-line-buffer.sh test
>     $ cd t && make T=t0081-line-buffer.sh prove
>
> I notice that [sh] spawned from prove is orphaned.
>
> 21643 pts/9    Ss     0:00      \_ bash
> 17149 pts/9    S+     0:00      |   \_ make T=t0081-line-buffer.sh prove
> 17155 pts/9    S+     0:00      |       \_ /bin/sh -c echo "*** prove ***"; GIT_CONFIG=.git/
> 17156 pts/9    S+     0:00      |           \_ /usr/bin/perl /usr/bin/prove --exec /bin/sh t
> 17157 pts/9    Z+     0:00      |               \_ [sh] <defunct>

Hmm, looks like the "kill $!" is not working like it is supposed to.
What is your /bin/sh?  How far does

	make T=0081-line-buffer.sh prove SHELL_PATH_SH='/bin/sh -x'

get before the lull?