Possible test deadlock

[voxik]

Testing on Fedora Rawhide with stronger crypto settings

# update-crypto-policies --set NEXT

I observe the following deadlock in OpenSSL test suite:

[ 1337/17319] OpenSSL::TestPair#test_connect_accept_nonblock#<Thread:0x000055555c3ad548@/builddir/build/BUILD/ruby-2.5.1/test/openssl/test_pair.rb:452 run> terminated with exception (report_on_exception is true):
/builddir/build/BUILD/ruby-2.5.1/test/openssl/test_pair.rb:453:in `initialize': SSL_CTX_use_certificate: ee key too small (OpenSSL::SSL::SSLError)
	from /builddir/build/BUILD/ruby-2.5.1/test/openssl/test_pair.rb:453:in `new'
	from /builddir/build/BUILD/ruby-2.5.1/test/openssl/test_pair.rb:453:in `block in test_connect_accept_nonblock'

Apparently, the thread crashes, because the DH key is too small, therefore the s2.accept_nonblock [1] is waiting for connection indefinitely. There should be either timeout, the crash of the th thread should be fatal or the state of the th thread should be checked.