Issue #21096 has been updated by midnight (Sarun R). You are one of the most responsive people I have ever encountered. To test the reproduction, iiewad provided a branch of his application where this issue occurs. (It’s essentially a standard Rails application with something like `--verbose` added to the `Dockerfile` for visualization.) ~~~bash git clone -b debug https://github.com/iiewad/blog.git iiewad-blog cd iiewad-blog ~~~ In my environment, I use the following command: ~~~bash sudo nerdctl build --platform=arm64 . ~~~ (containerd has both rootless and rootful modes; multi-architecture building requires the rootful one.) I’ve already confirmed that the code from the repository reproduces the issue in my environment.  Since he included `--verbose` in the `Dockerfile`, the screenshot shows where bootsnap is hanging. Software versions: iiewad-blog: commit-c8f6d15 nerdctl:
Client: Version: 2.0.2 OS/Arch: linux/amd64 Git commit: unknown buildctl: Version: 0.18.2
Server: containerd: Version: v1.7.23 GitCommit: 57f17b0a6295a39009d861b89e3b3b87b005ca27 runc: Version: 1.2.4 GitCommit: v1.2.4-0-g6c52b3fc541f
QEMU ~~~bash sudo systemctl start containerd sudo nerdctl run --privileged --rm tonistiigi/binfmt:qemu-v8.1.5 --install arm64 ~~~ Feel free to ask if you run into any issues with the reproduction steps or need more details about the environment I’m using. ---------------------------------------- Bug #21096: Ruby hangs up when compiling for bytecode on AArch64 emulated by QEMU https://bugs.ruby-lang.org/issues/21096#change-111695 * Author: midnight (Sarun R) * Status: Open * ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [x86_64-linux] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- Hello, We are experiencing issues when using [Bootsnap](https://github.com/Shopify/bootsnap) for production container image building, specifically when running `bundle exec bootsnap precompile --gemfile` on an emulated ARM64 environment on AMD64 hosts. Here are more details: * Bootsnap is a Ruby gem for bytecode caching, which speeds up loading times. It achieves this by calling `RubyVM::InstructionSequence.compile_file` and `RubyVM::InstructionSequence.load_from_binary`. * When running `bundle exec bootsnap precompile --gemfile` in the environment described (using QEMU to emulate the AArch64 instruction set), the process can compile and generate some bytecode but eventually hangs. * The hang seems random, occurring at different points during the process. * According to [a Rails GitHub issue](https://github.com/rails/rails/issues/54039), the issue affects both `Docker` and `containerd`, as well as native Linux and macOS environments. * From [a Bootsnap GitHub issue](https://github.com/Shopify/bootsnap/issues/495), the problem likely doesn't occur in Ruby `3.2.6` but appears in later versions. * So far, the common factors observed are: * Emulated ARM64 on AMD64 CPUs (likely using QEMU) * Newer Ruby versions (e.g., 3.3 and 3.4) As a user, I don't have the expertise to debug the issue but am willing to gather more information if provided with sufficient instructions. -- https://bugs.ruby-lang.org/