On Wed, Jul 10, 2013 at 12:36:40PM -0400, Brian Gernhardt wrote:
> The newest test in t0008 "streaming support for --stdin", seems to
> hang sporadically on my MacBook Pro (running 10.8.4). The hang seems
> to be related to running it in parallel with other tests, as I can
> only reliably cause it by running with prove and -j 3. However, once
> that has hung I am able to semi-reliably have it occur by running the
> test separately (with the test hung in the background, using separate
> trash directories via the --root option).
I can't replicate the hang here (on Linux) doing:
for i in `seq 1 30`; do
./t0008-ignores.sh --root=/tmp/foo/$i &
done
Do you know which test it is hanging on? You mentioned that you can
replicate it outside of "prove"; what does running with "-v" say?
The last test in t0008, with the fifos, would make me the most
suspicious. The way we do it _should_ be fine, but I'm wondering if the
shell is blocking in exec here:
mkfifo in out &&
(git check-ignore -n -v --stdin <in >out &) &&
exec 9>in &&
That is, if the fifo is not opened for some reason by the backgrounded
process (there's a race, of course, but the outer shell should just
block until the sub-shell actually opens it). I wonder if the
descriptor-opening behavior of:
cmd <in >out &
is different between shells (that is, if it backgrounds the opening of
in and out on some shells, but not on others). But then I would expect
it to fail consistently.
Just for fun, does switching the middle line there to:
(sh -c "git check-ignore -n -v --stdin <in >out" &) &&
have any effect?
-Peff
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