Who contributed to Elixir & Phoenix on June 9, 2026?

2 developers shipped this update, including SteffenDE and preciz.

What were the notable Elixir & Phoenix updates?

Add trace helper to ExUnit.Assertions, Add trace helper to ExUnit.Assertions (#15432), and Validate render_upload entry ref.

Elixir & Phoenix

Elixir, Phoenix, LiveView, and Ecto - the BEAM web stack

Pick a date

Topics: Elixir & Phoenix Full archive →

The Wire · Showcase

ELIXIR ADDS TRACE HELPER FOR ASYNC TEST ASSERTIONS

By RepoJournal · Filed 06:05 UTC on June 9, 2026 · About Elixir & Phoenix

2 people shipped this

SteffenDE @SteffenDE 1 cited

preciz @preciz 1 cited

Elixir core shipped a new trace helper that solves the hardest problem in testing concurrent systems: asserting on state when you don't control the timing.

The trace helper lands in ExUnit.Assertions [1] and directly addresses a pattern that has frustrated Elixir developers testing LiveViews and GenServers subscribed to asynchronous messages. You trigger work in one process, another process delivers the result on its own schedule, and your test needs to assert on the final state without flaky sleeps or polling [2]. The helper lets you wait for specific trace events and assert on rendered output once they fire, turning a timing problem into a deterministic one. This started as a LiveView testing challenge [3] but the solution is generic enough to work anywhere you have inter-process communication. Phoenix LiveView also tightened upload validation, now raising when you try to render an upload entry that doesn't exist [4], catching bugs earlier in the development cycle instead of at runtime.

Action items

→ Update Elixir when new version ships and review trace helper docs for your async test patterns elixir-lang/elixir [plan]
→ Check LiveView tests using render_upload for non-existent entries and fix before upgrading phoenixframework/phoenix_live_view [plan]

References

[1] Add trace helper to ExUnit.Assertions ↗ elixir-lang/elixir
[2] Add trace helper to ExUnit.Assertions (#15432) elixir-lang/elixir
[3] Validate render_upload entry ref ↗ phoenixframework/phoenix_live_view
[4] Validate render_upload entry ref (#4272) phoenixframework/phoenix_live_view

Quick answers

What shipped in Elixir & Phoenix on June 9, 2026?: Elixir core shipped a new trace helper that solves the hardest problem in testing concurrent systems: asserting on state when you don't control the timing. In total, 2 commits and 2 pull requests landed.
Who contributed to Elixir & Phoenix on June 9, 2026?: 2 developers shipped this update, including SteffenDE and preciz.
What were the notable Elixir & Phoenix updates?: Add trace helper to ExUnit.Assertions, Add trace helper to ExUnit.Assertions (#15432), and Validate render_upload entry ref.

LIVEVIEW ASYNC CLEANUP FIX SHIPS ALONGSIDE RANGE OPTIMIZATIONS

Phoenix LiveView closes a critical async task test failure while Elixir cuts unnecessary abs calls from Range operations.

elixir 19 shipped 1-min read

Elixir & Phoenix 1 day ago

PHOENIX LIVE VIEW SEALS CRITICAL NODE NAME LEAK IN UPLOAD TOKENS

A reverted encryption fix exposes how Phoenix was leaking BEAM node identities through unencrypted upload tokens, and the core team is pivoting to a cleaner solution using term_to_binary.

elixir 23 shipped 2-min read

Elixir & Phoenix 2 days ago

ELIXIR FIXES CALENDAR AND COMPILER EDGE CASES ACROSS FIVE PATCHES

Alexander Gubarev landed five targeted fixes to Calendar.ISO and ParallelCompiler that close gaps in time parsing, validation guards, and documentation.

elixir 15 shipped 1-min read

Elixir & Phoenix 3 days ago

ELIXIR TOOLING FIXES LAND AHEAD OF SYSTEM COMPATIBILITY PUSH

The compiler stops misinterpreting profile flags, string reversal handles invalid UTF8 correctly, and Ecto gains fragment column selection in a wave of fixes that shores up core library reliability.

elixir 11 shipped 1-min read

Elsewhere on the wire

AI Agents about 9 hours ago

CLAUDE OPUS 5 LANDS ACROSS THE STACK

The newest Anthropic model is now live in langchain, Cline, and llama-index, with native support for extended reasoning and 1M context windows.

ai-agents 28 shipped 1-min read

Local LLMs about 9 hours ago

OLLAMA LANDS LAGUNA SUPPORT AND CRUSHES MEMORY LEAKS WHILE SGLANG HITS V0.5.16 WITH CONFIDENCE-DRIVEN SPECULATIVE DECODING

Ollama shipped three critical performance and reliability fixes for Metal residency and concurrent access patterns, while SGL-Lang released 0.5.16 with a new speculative algorithm hitting 383.7 tok/s on DeepSeek-V4.

+11

llms 210 shipped 2-min read

@CachyOS about 9 hours ago

HYPRLAND V0.56 FIXES LAND, PACKAGE ECOSYSTEM ROLLS FORWARD

Hyprland configuration updated for v0.56 compatibility across multiple desks, while the AUR-derived ecosystem locked in four automated package bumps.

infra 85 shipped 1-min read

Mobile platforms about 9 hours ago

FLUTTER PATCHES WEB GESTURE BUG, SWIFT SIMPLIFIES CODEGEN PATHS

Flutter 3.50 shipped a critical fix for iOS 27 WebKit that was silently dropping tap events, while Swift consolidated scattered CodeGen configuration into a single control point across three major repos.