docker-compose bug test case

docker-compose.yml

app:
  build: .
  command: bash

Dockerfile

FROM ubuntu:14.04

Makefile

all: bash test.sh

test.sh

set -eux

(for i in $(seq 1 30); do echo hi | docker-compose run app cat; done) > out

lines=$(cat out | wc -l)
echo "Got $lines"
if [ "$lines" -eq 30 ]; then
    echo "OK"
else
    echo "Expected 30 lines, but got $lines"
    exit 1
fi

$  docker-compose --version
docker-compose version 1.7.0rc1, build 1ad8866
$  docker-machine --version
docker-machine version 0.7.0-rc2, build 60dbecb
$  docker --version
Docker version 1.11.0-rc3, build eabf97a

Usually outputs around ~22 lines for me, instead of the expected 30.