Who contributed to Elixir & Phoenix on July 29, 2026?

4 developers shipped this update, including Alexander Gubarev, Steffen Deusch, lukaszsamson, and José Valim.

What were the notable Elixir & Phoenix updates?

Fix Date.range/3 raises wrong exception for invalid step, Fix IEx.Helpers.h print spec for default arg function, and Enforce writable fields after prepare_changes (#4771).

Elixir & Phoenix

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

Pick a date

Topics: Elixir & Phoenix Full archive →

The Wire · Showcase

ELIXIR TIGHTENS ERROR HANDLING ACROSS DATE, ECTO, AND IEXHELPERS

By RepoJournal · Filed 07:02 UTC on July 29, 2026 · About Elixir & Phoenix

4 people shipped this

Alexander Gubarev @AlexGx 2 cited

Steffen Deusch @SteffenDE 2 cited

lukaszsamson @lukaszsamson 1 cited

José Valim @josevalim

Date.range now surfaces ArgumentError instead of Protocol.UndefinedError when passed invalid step values, catching a class of bugs that silently fail in production code.

The core fix lands in elixir-lang/elixir where Date.range/3 now validates step arguments before attempting to stringify them, raising the correct ArgumentError [1] instead of confusing protocol errors. Alexander Gubarev also patched IEx.Helpers.h to print correct specs for default arg functions [2], a polish that keeps introspection reliable. Over in ecto, a breaking change merged that enforces writable fields after prepare_changes callbacks [3], catching code that was already broken but silently succeeding. The change adds `drop_non_writable_changes!/4` on prepare results, technically a breaking change but one that fixes #4770. Phoenix LiveView picked up asset updates [4] and attribution fixes [5] to keep the rendering pipeline clean. Across all three repos, the pattern is the same: fail fast with correct error types rather than propagating confusion downstream.

Action items

→ Audit your Date.range calls if you accept user-provided step values elixir-lang/elixir [plan]
→ Review prepare_changes callbacks in Ecto schemas for non-writable field mutations before upgrading elixir-ecto/ecto [plan]
→ Update Phoenix LiveView assets at next release cycle phoenixframework/phoenix_live_view [monitor]

References

[1] Fix Date.range/3 raises wrong exception for invalid step ↗ elixir-lang/elixir
[2] Fix IEx.Helpers.h print spec for default arg function ↗ elixir-lang/elixir
[3] Enforce writable fields after prepare_changes (#4771) elixir-ecto/ecto
[4] Update assets phoenixframework/phoenix_live_view
[5] fix missing attribution phoenixframework/phoenix_live_view

Quick answers

What shipped in Elixir & Phoenix on July 29, 2026?: Date.range now surfaces ArgumentError instead of Protocol.UndefinedError when passed invalid step values, catching a class of bugs that silently fail in production code. In total, 10 commits and 4 pull requests landed.
Who contributed to Elixir & Phoenix on July 29, 2026?: 4 developers shipped this update, including Alexander Gubarev, Steffen Deusch, lukaszsamson, and José Valim.
What were the notable Elixir & Phoenix updates?: Fix Date.range/3 raises wrong exception for invalid step, Fix IEx.Helpers.h print spec for default arg function, and Enforce writable fields after prepare_changes (#4771).

PHOENIX LIVE VIEW PATCHES CLIENT NAVIGATION, ELIXIR CLEANS UP MAP FETCH INTERNALS

Phoenix Live View shipped five structural improvements overnight, from cancellable client-side navigation to diagnostic namespacing, while Elixir's core team refactored map fetch code to eliminate duplication.

elixir 34 shipped 1-min read

Elixir & Phoenix 2 days ago

ECTO FIXES SUBQUERY PLANNING IN JOINS, ELIXIR PATCHES IEX PARSING

Ecto's query planner now handles subqueries correctly in interpolated join filters, while Elixir fixes a syntax error that broke 'not in' as a continuation operator in IEx.

elixir 10 shipped 1-min read

Elixir & Phoenix 3 days ago

ELIXIR STRIPS REDUNDANT GUARDS, FIXES TUPLE PROJECTION BUG

Barna Kovacs landed three optimization PRs removing dead code from core Enum and Calendar modules, while a separate fix addresses a flawed tuple projection algorithm that was producing inconsistent type representations.

elixir 22 shipped 1-min read

Elixir & Phoenix 4 days ago

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

Elsewhere on the wire

AI Agents about 4 hours ago

LANGCHAIN CORES SHIP, ANTHROPIC THINKING BLOCKS FIXED, OPENHANDS TIGHTENS WEBSOCKET AUTH

LangChain released two core packages with critical fixes for streaming stability and environment variable handling, while OpenHands closed a security gap that left WebSocket connections unprotected.

ai-agents 119 shipped 1-min read

Local LLMs about 4 hours ago

OLLAMA RIPS OUT IMAGE GENERATION, LLAMA.CPP SHIPS SPECULATIVE DECODING

Ollama removed its entire MLX image generation pipeline overnight, while llama.cpp landed DSpark speculative decoding and fixed a critical SYCL memory bug affecting Arc GPUs.

+11

llms 239 shipped 2-min read

@CachyOS about 4 hours ago

KERNEL SCHEDULER UPDATES ACROSS BORE AND SCX TOOLING

CachyOS shipped BORE 6.8.0 patches across two kernel series while upgrading its sched-ext ecosystem in parallel, signaling major tuning work ahead.

infra 83 shipped 1-min read

@dotnet about 4 hours ago

MAUI CI SCANNER FIXED, MSBUILD ALIGNS TO .NET 10.0.10

A critical MAUI CI pipeline flaw that could pass builds with unscanned device tests is now patched, while MSBuild runtime dependencies ship their first 10.0.10 servicing bump.