[tor-bugs] #29036 [Core Tor/Tor]: Coverage merge failures cause test_process_slow stderr check to fail

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#29036: Coverage merge failures cause test_process_slow stderr check to fail
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  ahf
     Type:  defect                               |         Status:
                                                 |  assigned
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.4.1.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  unspecified
 Severity:  Major                                |     Resolution:
 Keywords:  041-accepted-20190115, regression,   |  Actual Points:
  tor-ci                                         |
Parent ID:                                       |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by teor):

 Here are the full logs, I'm going to restart the job to clear the error:
 {{{
 slow/crypto/fuzz_donna/ed25519_donna: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/crypto/fuzz_donna/ed25519_ref10: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/process/callbacks:
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
   FAIL src/test/test_process_slow.c:241:
 assert(smartlist_len(process_data->stderr_data) OP_EQ 3): 4 vs 3
   [callbacks FAILED]
 slow/process/callbacks_terminate:
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/prob_distr/stochastic_genpareto: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/prob_distr/stochastic_geometric: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/prob_distr/stochastic_uniform: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/prob_distr/stochastic_logistic: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/prob_distr/stochastic_log_logistic: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 slow/prob_distr/stochastic_weibull: [forking]
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 OK
 1/20 TESTS FAILED. (0 skipped)
 profiling:/home/travis/build/torproject/tor/src/trunnel
 /src_trunnel_libor_trunnel_testing_a-socks5.gcda:Merge mismatch for
 function 108
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29036#comment:4>
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