Erlang developers know this pattern and OTP design guidelines discourage it. But knowing about it doesn’t prevent it. Researchers found previously unknown instances in production OTP libraries written by experts following the guidelines. And a 2026 OOPSLA paper by Fowler and Hu proves a stronger result: two protocols that are individually deadlock-free can still combine to deadlock in an actor system. The only solutions are restricting each actor to a single session at a time (too limiting for real servers) or building a flow-sensitive type system to thread protocol state through every function call. The problem isn’t that developers write circular calls by accident. It’s that deadlock-freedom doesn’t compose.
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We run JavaScript at scale across the Terminal, using underlying runtimes and engines such as Chromium, Node.js and SpiderMonkey. Our users, and the financial markets in which they invest, span every time zone on earth. We pass timestamps constantly: between services, into storage, into the UI, and across systems that all have to agree on what "now" means, even when governments change DST rules with very little notice.，详情可参考超级权重