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wire 2026-08-23
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JOSE VALIM FIXES THE CLASUE BUG

By RepoJournal · Filed · About Elixir & Phoenix · Composed from the cited sources · methodology

josevalim reisub
2 people shipped this
josevalim @josevalim 3 cited reisub @reisub 2 cited

Jose Valim shipped two refactors plus the actual fix for that `none` clause compiler issue, and a UTC fast path in DateTime could save you a TZ DB lookup.

Jose Valim landed a fix that removes `none` clauses when non-empty clauses exist, closing #15777 [1]. This one's a compiler behavior change, and he refactored the code first so the fix is easier to follow [1]. Meanwhile, Dino Kovač's `DateTime.add/4` and `shift_zone/3` UTC fast path [2] means UTC datetimes no longer hit the TZ database when the app isn't started [2]. It's a niche issue, but the benchmark data shows real gains on Apple M1 Max [2]. Both are open PRs, so now's the time to review [3]. The compiler change is the one to watch if you've hit that edge case [4]. Skip the domain computation extraction unless you're deep in that code [5].

$ ls elixir/reviews/ # the step-back reads

the week in review Phoenix rewrites every CI workflow to hardened patterns the month in review Phoenix adds CI test summary formatter
Full archive → Weekly reviews →

Quick answers

What shipped in Elixir & Phoenix on August 23, 2026?
Jose Valim shipped two refactors plus the actual fix for that `none` clause compiler issue, and a UTC fast path in DateTime could save you a TZ DB lookup. In total, 4 commits and 2 pull requests landed.
Who contributed to Elixir & Phoenix on August 23, 2026?
2 developers shipped this update, including josevalim and reisub.
What were the notable Elixir & Phoenix updates?
Remove none clauses if there are non empty clauses, closes #15777, Add `DateTime` `add/4` and `shift_zone/3` UTC fast path, and Remove none clauses if there are non empty clauses, closes #15777.
♥

$ log Elixir & Phoenix --recent

Algorithm L replaces inside-out shuffles in Enum 3 shipped Base validation regression fixed, formatter comments stay put 16 shipped Formatter bugs that changed program meaning, and a LiveView assign that always fired 25 shipped Base validators go SWAR, formatter output stabilizes 4 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl standardizes low-precision rollout kernels on DeepGEMM Agent Security Guardrails exposes hooks over HTTP, certifi floor raised in agent-scan

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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