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The article details a puzzling NoMethodError in a Ruby application using the FFI library. It uncovers a critical bug related to garbage collection that can lead to internal Hashes being freed and replaced by Strings, causing runtime errors. The author explores the implications of missing write barriers in the FFI C extension.
A bug was discovered in the Go programming language's ARM64 compiler, which led to unexpected program behaviors. The team at Cloudflare detailed their investigation process, including testing and debugging steps, that ultimately helped identify and resolve the issue. This case highlights the importance of thorough testing in software development to catch potential compiler-related bugs.