Bootsnap causes kamal setup to hang in Ruby 3.3.5

[iiewad]

I have a new Rails app, There are some env

ruby 3.3.5
rails 8.0.0
kamal 2.3.0

Dockerfile

# Install application gems
RUN bundle install
RUN rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
RUN rm -rf tmp/cache/bootsnap*
RUN bundle exec bootsnap precompile --gemfile

# Copy application code
COPY . .

# Precompile bootsnap code for faster boot times
RUN bundle exec bootsnap precompile app/ lib/

# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

When I run kamal setup

 DEBUG [c688ef86]       #15 /bin/sh -c bundle install
 DEBUG [c688ef86]       #15 CACHED
 DEBUG [c688ef86]
 DEBUG [c688ef86]       #16 /bin/sh -c rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
 DEBUG [c688ef86]       #16 CACHED
 DEBUG [c688ef86]
 DEBUG [c688ef86]       #17 /bin/sh -c rm -rf tmp/cache/bootsnap*
 DEBUG [c688ef86]       #17 CACHED
 DEBUG [c688ef86]
 DEBUG [c688ef86]       #18 /bin/sh -c bundle exec bootsnap precompile --gemfile

[iiewad]

I changed ruby version to 3.2.5. bootsnap precompile is ok!

[mattgibson]

Same issue using Ruby 3.3.6 and Rails 8.0.1.

I'm on an Intel mac and the build works if I leave the architecture as default. When targeting arm64 however, it hangs with no output from bootsnap.

Steps to reproduce

1. Install Ruby 3.3.6
2. install rails 8.0.1 gem with gem install rails
3. rails new docker_test
4. cd docker_test
5. docker buildx build --platform linux/arm64 .

Expected:
The docker build completes with no errors.
Actual:
Docker build hangs with the output from bundle install as the last lines on the console.

If I use docker buildx build . then it works fine.

The problematic line in the dockerfile is:

RUN bundle install && \
    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
    bundle exec bootsnap precompile --gemfile

Breaking it apart into this shows that it's bootsnap, but gives no ouput:

RUN bundle install
RUN rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
RUN bundle exec bootsnap precompile --gemfile --verbose

[mattgibson]

Switching to Ruby 3.2.6 fixes it for me too