New MRI test failures on less common architectures #8005
Description
Since JRuby 9.4, it seems many MRI tests now fail on architectures other than i386 and amd64.
For example, running mri-core on s390x yields dozen of errors such as this:
1) Failure:
TestThread#test_thread_value_in_trap [/tmp/autopkgtest.pNZ426/autopkgtest_tmp/test/mri/ruby/test_thread.rb:1013]:
assert_separately failed with error message
pid 85599 exit 0
| failed to load native console support: native console only supported on i386, x86_64 and powerpc64
| /usr/share/jruby/lib/ruby/stdlib/io/console/ffi/stty_console.rb:78: warning: assigned but unused variable - ypixel
| /usr/share/jruby/lib/ruby/stdlib/io/console/ffi/stty_console.rb:78: warning: assigned but unused variable - xpixel
| failed to load stty console support: native console only supported on i386, x86_64 and powerpc64
| io/console not supported; tty will not be manipulated
A full test run log on s390x can be found at https://gitlab.torproject.org/lavamind/jruby-ci/-/jobs/402329/raw
This appears to be related to the fact that assert_separately() now relies on io/console, which itself has limited support for other architectures.