Bug#1094260: FTBFS: ./test/tbb/test_mutex.cpp:109: FATAL ERROR: REQUIRE( n_transactions_attempted.load(std::memory_order_relaxed) ) is NOT correct!

[Santiago Vila]

Hi.

Don't know if it's related or not, but on machines with 1 CPU,
the autobuilder *hangs*:

[...]
  27/136 Test  #27: test_concurrent_queue ....................   Passed    0.25 sec
         Start  28: test_mutex
  28/136 Test  #28: test_mutex ...............................   Passed    0.04 sec
         Start  29: test_function_node
E: Build killed with signal TERM after 90 minutes of inactivity
--------------------------------------------------------------------------------

Please try building with GRUB_CMDLINE_LINUX="nr_cpus=1". If it does not fail
that way please contact me privately and I can provide a VM for you to test.

Thanks.