[Bug 226722] lang/opencoarrays: Silently reboots system when running "make test"

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226722

--- Comment #4 from Anton Shterenlikht <as at cmplx.uk> ---
I've done a bit more digging.
"make test" results in a halt only when run as root,
which is the default.

When I do "chown -R user:user work", where user is some
unprivileged user, then "make test" does not cause a hang.

The ideal solution is not to run the tests as root anyway.
In fact, if lang/opencoarrays is built with OpenMPI or OpenMPI2,
than the tests will not run under root:

Script started on Thu Mar 22 11:41:05 2018
Command: ctest -VV
UpdateCTestConfiguration  from
:/usr/ports/lang/opencoarrays/work/.build/DartConfiguration.tcl
UpdateCTestConfiguration  from
:/usr/ports/lang/opencoarrays/work/.build/DartConfiguration.tcl
Test project /usr/ports/lang/opencoarrays/work/.build
Constructing a list of tests
Done constructing a list of tests
Updating test list for fixtures
Added 0 tests to meet fixture requirements
Checking test dependency graph...
Checking test dependency graph end
test 1
      Start  1: initialize_mpi

1: Test command: /usr/local/bin/bash
"/usr/ports/lang/opencoarrays/work/.build/bin/cafrun" "-np" "2"
 "--hostfile" "/usr/ports/lang/opencoarrays/work/.build/hostfile"
"/usr/ports/lang/opencoarrays/work
/.build/bin/OpenCoarrays-2.0.0-tests/initialize_mpi"
1: Test timeout computed to be: 9.99988e+06
1: --------------------------------------------------------------------------
1: mpiexec has detected an attempt to run as root.
1: Running at root is *strongly* discouraged as any mistake (e.g., in
1: defining TMPDIR) or bug can result in catastrophic damage to the OS
1: file system, leaving your system in an unusable state.
1:
1: You can override this protection by adding the --allow-run-as-root
1: option to your cmd line. However, we reiterate our strong advice
1: against doing so - please do so at your own risk.
1: --------------------------------------------------------------------------
1: Error: Command:
1:    `/usr/local/mpi/openmpi2/bin/mpiexec -n 2 --hostfile
/usr/ports/lang/opencoarrays/work/.build/
hostfile
/usr/ports/lang/opencoarrays/work/.build/bin/OpenCoarrays-2.0.0-tests/initialize_mpi`
1: failed to run.
 1/63 Test  #1: initialize_mpi .......................***Failed  Required
regular expression not fou
nd.Regex=[Test passed.


Yes, adding --allow-run-as-root works, and
the tests can be run as root, but it's a bad
idea, as the halt shows.

So the question is:

Is anybody in FreeBSD interested in investigating why
the hang happens when the tests are run as root?

If so, then this PR should be fixed.

If no, meaning that running make test under root is
asking for trouble, and a halt in an MPI program
run as root is not that surprising, then
this PR can be closed, as there is no problem.

I'll then open another PR asking for help to
change the port to *not* run the tests as root.

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