When running the bootsnap test suite on the Debian ppc64el architecture, some tests will cause bootsnap to hang forever. One can reproduce this with, for example, Bootsnap::CLITest#test_precompile_gemfile. I can reproduce this with both ruby3.0 and ruby3.1, but only on ppc64el. No other official Debian architecture is affected.

Steps to reproduce

1. Download the "ppc64el-pseries" qemu images from https://people.debian.org/~gio/dqib/.
2. Unzip the contents, cd into the generated directory
3. Boot the image with this command line: qemu-system-ppc64le -machine pseries -cpu power9 -m 4G -smp 2 -drive file=image.qcow2 -device e1000,netdev=net -netdev user,id=net,hostfwd=tcp::2222-:22 -kernel kernel -initrd initrd -nographic -append "root=LABEL=rootfs console=hvc0"
4. Login as root, password "root"
5. apt-get update && apt-get install -qy ruby-dev git
6. git clone https://github.com/Shopify/bootsnap.git
7. cd bootsnap
8. bundle install
9. bundle exec rake TESTOPTS='-v -ntest_precompile_gemfile'

(ruby3.0 is currently the default. to reproduce with ruby3,1, install ruby3.1-dev, and use bundle3.1 instead of just bundle in the command lines above).

the output looks like this:

# bundle exec rake TESTOPTS='-v -ntest_precompile_gemfile'
/usr/bin/gmake install target_prefix=
/usr/bin/install -c -m 0755 bootsnap.so /root/bootsnap/lib/bootsnap
cp tmp/powerpc64le-linux-gnu/bootsnap/3.0.4/bootsnap.so tmp/powerpc64le-linux-gnu/stage/lib/bootsnap/bootsnap.so
Run options: -v -ntest_precompile_gemfile --seed 52554

# Running:

Bootsnap::CLITest#test_precompile_gemfile = 

(and stays there forever, until I interrupt with a control-c; but even then there are multiple processed left behind that I need to kill manually)

Bootsnap version: from git
Ruby version: 3.0 or 3.1