Occasional test failures

[eserte]

On some of my smoker systems I see the test suite failing:

Killing hung worker (6042)                                                                                                                                                                                                                                                
# Hung worker error: timed out after 2 seconds at /home/cpansand/.cpan/build/2018120418/AnyEvent-Task-0.805-0/blib/lib/AnyEvent/Task/Client/Checkout.pm line 127.                                                                                                         
                                                                                                                                                                                                                                                                          
#   Failed test 'no timed out err'                                                                                                                                                                                                                                        
#   at t/timeout-hung-worker.t line 47.                                                                                                                                                                                                                                   
                                                                                                                                                                                                                                                                          
#   Failed test 'hung worker err'                                                                                                                                                                                                                                         
#   at t/timeout-hung-worker.t line 48.                                                                                                                                                                                                                                   
# Looks like you failed 2 tests of 3.                                                                                                                                                                                                                                     
t/timeout-hung-worker.t ..........                                                                                                                                                                                                                                        
Dubious, test returned 2 (wstat 512, 0x200)                                                                                                                                                                                                                               
Failed 2/3 subtests                                                                                                                                                                                                                                                       
...
#   Failed test 'no timed out err'                                                                                                                                                                                                                                        
#   at t/worker-_exits.t line 49.                                                                                                                                                                                                                                         
                                                                                                                                                                                                                                                                          
#   Failed test 'sudden death err'                                                                                                                                                                                                                                        
#   at t/worker-_exits.t line 50.                                                                                                                                                                                                                                         
#                   'timed out after 1 seconds at /home/cpansand/.cpan/build/2018120418/AnyEvent-Task-0.805-0/blib/lib/AnyEvent/Task/Client/Checkout.pm line 127.                                                                                                         
# '
#     doesn't match '(?^u:worker connection suddenly died)'

#   Failed test 'got same fatal error after calling checkout again'
#   at t/worker-_exits.t line 57.
#                   'timed out after 1 seconds at /home/cpansand/.cpan/build/2018120418/AnyEvent-Task-0.805-0/blib/lib/AnyEvent/Task/Client/Checkout.pm line 127.
# '
#     doesn't match '(?^u:worker connection suddenly died)'
# Looks like you failed 3 tests of 4.
t/worker-_exits.t ................ 
Dubious, test returned 3 (wstat 768, 0x300)
Failed 3/4 subtests