bug#52998: ell test suite failure (nondeterministic)

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hello,

When built under a very loaded system, ell may fail its test suite
in a nondeterministic fashion like so:

--8<---------------cut here---------------start------------->8---
--- ./test-suite.log --------------------------------------------------------

================================
   ell 0.41: ./test-suite.log
================================

# TOTAL: 40
# PASS:  38
# SKIP:  0
# XFAIL: 0
# FAIL:  2
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: unit/test-dbus-message-fds
================================

launching dbus-daemon
dbus-daemon process 16906 created
ready
request name result=failed
TEST: FD passing 1
TEST FAILED in get_random_return_callback at unit/test-dbus-message-fds.c:278: !l_dbus_message_get_error(message, ((void *)0), ((void *)0))
Disconnected from DBus
FAIL unit/test-dbus-message-fds (exit status: 134)

FAIL: unit/test-dbus-properties
===============================

launching dbus-daemon
dbus-daemon process 16899 created
ready
request name result=success
TEST: Legacy properties get
TEST: Legacy properties set
TEST: Legacy optional property
TEST: org.freedesktop.DBus.Properties get
TEST: org.freedesktop.DBus.Properties set
TEST: Property changed signals
Disconnected from DBus
FAIL unit/test-dbus-properties (exit status: 134)


error: in phase 'check': uncaught exception:
%exception #<&invoke-error program: "make" arguments: ("check" "-j" "24") exit-status: 2 term-signal: #f stop-signal: #f> 
phase `check' failed after 46.2 seconds
command "make" "check" "-j" "24" failed with status 2
--8<---------------cut here---------------end--------------->8---

I've had this occur twice so far, always when the build machine is busy
building multiple things in parallel.

I suspect a dbus timeout or similar.

Maxim