Elixir v1.20.0-rc.5 release candidate is out, requiring Erlang/OTP 27+ with compatibility up to OTP 29. Key enhancements include occurrence typing on case/cond/with expressions, SWAR-optimized string operations, Float.round/2 optimization, increased inspect limits with Erlang record support, and new Mix commands like `mix source`. A notable breaking change disallows raw CR line endings in strings and comments for security. Several bug fixes address compiler crashes, Logger configuration persistence, and Stream/String edge cases.
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