stack --test --file-watch threading output quirk #1635
Description
when working on some test specs and having stack rebuild and test on file modification, i observe some strange output that appears to come about due to the order of text output to the console.
the behaviour i note is output like the following
...
Compl[t3e1dmTest suite failure for package thing-0.1.0.0
thing-test: exited with: ExitFailure 1
Logs printed to console
2[a0cmtiToynp(es )h.e
lp for available commands. Press enter to force a rebuild.
(note that control characters have been interspersed amongst regular output)
my environment
06:10 PM noon ∈ >stack --version
Version 1.0.0, Git revision 3bc26237b5b3c387b8fd564459ea4dd88fd58b30 (2939 commits) x86_64
06:12 PM noon ∈ >uname -m && cat /etc/*release
x86_64
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.2 LTS"
NAME="Ubuntu"
VERSION="14.04.2 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.2 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
to reproduce this bug,
stack new thing hspec(new project from the hspec template)stack build --file-watch --testbuild and watch for changes and run tests- make some change to one of the tests and make it fail
i just added to the existing spec
it "fails" $ do
True `shouldBe` False
now, i only observe this quirk when the tests fail, and when i actually make a change to the file itself, as opposed to just pressing enter in the stack terminal to re-build.
if it's relevant, i'm using zsh for my shell
06:12 PM noon ∈ >zsh --version
zsh 5.0.2 (x86_64-pc-linux-gnu)
(i'll note that it works fine if i press enter; with the failing output suitably coloured red; in an earlier version of stack i was using i got similar garbled text, but the output was no longer red when it failed. in this version, it's always red, but the final few lines are garbled.)