TestThread#test_signal_at_join fails on aarch64
I observed the following error on Ruby 2.7.1 building in Fedora aarch64 CI. It was just one time error. It does not always happen.
1) Error: TestThread#test_signal_at_join: Timeout::Error: execution of assert_separately expired timeout (120 sec) pid 2314088 killed by SIGABRT (signal 6) (core dumped) | /builddir/build/BUILD/ruby-2.7.1/test/ruby/test_thread.rb:1346:in `test_signal_at_join' Finished tests in 1379.712832s, 15.2372 tests/s, 1972.9127 assertions/s.