Comment 2 for bug 1959628

This is impacting ruby-tilt, whose autopkgtest is failing on ppc64el right now. It's important to mention that Debian apparently isn't impacted by this, which probably means that the error might be happen somewhere else.

Note to self: glibc 2.34 doesn't ship with a separate libpthread anymore, and load_lock eventually calls uses rb_thread_shield_wait, which seems to make use of some pthread functions.