RepoJournal
Mobile platforms

Mobile platforms

Flutter, Swift, and Kotlin - the mobile platforms developers ship on

Keep up with Mobile platforms in about 3 minutes a day: what actually shipped — the commits, pull requests, releases, and security advisories that matter.

One email a day. Unsubscribe in one click.

Pick a date

  1. Sat 16 may
  2. Sun 17 may
  3. Thu 21 may
  4. Sat 23 may
  5. Sun 24 may
  6. Mon 25 may
  7. Tue 26 may
  8. Sun 31 may
  9. Mon 1 jun
  10. Sat 13 jun
  11. Sun 14 jun
  12. Mon 15 jun
  13. Wed 17 jun
  14. Thu 18 jun
  15. Sat 27 jun
  16. Mon 29 jun
  17. Wed 1 jul
  18. Sun 5 jul
  19. Mon 6 jul
  20. Sun 12 jul
  21. Mon 13 jul
  22. Sun 19 jul
  23. Tue 21 jul
  24. Sat 25 jul
  25. Sun 26 jul
  26. Mon 27 jul
  27. Sun 2 aug
  28. Today 9 aug
Topics: Mobile Full archive →

The Wire · Showcase

FLUTTER KILLS METAL CRASH, SWIFT DITCHES DEAD THREAD CODE

By RepoJournal · Filed · About Mobile platforms

bdero cbracken hellohuanlin DougGregor gonzalolarralde Maksim Verevkin
6 people shipped this
bdero @bdero 2 cited cbracken @cbracken 1 cited hellohuanlin @hellohuanlin 1 cited DougGregor @DougGregor 1 cited gonzalolarralde @gonzalolarralde 1 cited Maksim Verevkin @MaxVerevkin 1 cited

Impeller's shader compiler was silently crashing Metal apps at draw time; Flutter just plugged it with a bounds check that the GLES backend had months ago.

Flutter shipped three critical fixes across the rendering stack. The biggest: Impeller now skips dead-code-eliminated resources on Metal [1], stopping the AGX driver crash that happened when the shader compiler optimized out a fragment sampler but reflection still tried to bind it at an out-of-range index. On the same front, Flutter GPU now raises proper Dart exceptions instead of crashing the process when you build an invalid render pipeline [2], surfacing shader stage mismatches up front rather than on first draw. A platform views regression that gutted web view buttons got reverted [3] after an internal project reported the damage; the team couldn't repro locally but shipped the revert rather than ship broken. Meanwhile, iOS fixed a thread-safety data race in VSyncClient tests [4] where the test harness was reaching unsynchronized into CADisplayLink from the test thread while the actual client ran on a dedicated worker, triggering undefined behavior that CADisplayLink's design forbids. On the Swift side, the standard library shipped a cleanup: Doug Gregor removed the ThreadLocalStorage abstraction that's sat unused for four years [5], and embedded Swift now connects Concurrency to platform-backed threading instead of the single-threaded stub [6], letting embedded targets define their own execution-context behavior. Kotlin fixed a reflection bug where inline classes with companion properties shadowed the underlying field lookup [7].

One email a day. Unsubscribe in one click.

Action items

References

  1. [1] [Impeller] Skip binding dead-code-eliminated resources on Metal ↗ flutter/flutter
  2. [2] [Flutter GPU] Raise Dart errors for invalid render pipelines and memoize per-draw pipeline state ↗ flutter/flutter
  3. [3] Revert "Improve non rect platform view rendering (#182662)" ↗ flutter/flutter
  4. [4] iOS: Serialise CADisplayLink access in VSyncClient tests ↗ flutter/flutter
  5. [5] [stdlib] Remove standard library's ThreadLocalStorage ↗ apple/swift
  6. [6] [Embedded] Enable platform-backed threading in Concurrency ↗ apple/swift
  7. [7] JVM/Reflection: fix underlying field search for inline classes ↗ JetBrains/kotlin

Quick answers

What shipped in Mobile platforms on August 2, 2026?
Impeller's shader compiler was silently crashing Metal apps at draw time; Flutter just plugged it with a bounds check that the GLES backend had months ago. In total, 16 commits and 13 pull requests landed.
Who contributed to Mobile platforms on August 2, 2026?
6 developers shipped this update, including cbracken, bdero, hellohuanlin, DougGregor, gonzalolarralde, and Maksim Verevkin.
What were the notable Mobile platforms updates?
[Impeller] Skip binding dead-code-eliminated resources on Metal, [Flutter GPU] Raise Dart errors for invalid render pipelines and memoize per-draw pipeline state, and Revert "Improve non rect platform view rendering (#182662)".

More from Mobile platforms

Mobile platforms Mobile platforms

SWIFT RUNTIME GETS BULK REFCOUNTING BOOST, FLUTTER TRACKING UPSTREAM DARTS

Swift's refcounting test suite just got faster with bulk operations, while Flutter is locked in sync with three concurrent Dart SDK rolls as the platform teams chase down edge cases near powers of two.

Lau Ching Jun engine-flutter-autoroll mikeash FlickerSoul +4
mobile 34 shipped
Mobile platforms Mobile platforms

KOTLIN COMPILER FIXES ELVIS OPERATOR FALSE POSITIVES, TIGHTENS WASM CACHING

Kotlin's control flow graph just got smarter about dead code detection, eliminating false warnings that have been shadowing real issues.

bnorm mpiekutowski igoriakovlev dimonchik0036
mobile 29 shipped
Mobile platforms Mobile platforms

SWIFT MACRO IMPORTS AND KOTLIN CLASS INITIALIZATION FIXES SHIP ACROSS PLATFORMS

Swift's ClangImporter gains APINotes-driven macro customization while Kotlin standardizes NoClassDefFoundError behavior across JVM and native targets.

engine-flutter-autoroll compnerd hamishknight DougGregor +2
mobile 22 shipped
Mobile platforms Mobile platforms

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.

jesswrd engine-flutter-autoroll flutter-zl LouiseHsu +11
mobile 147 shipped

Daily updates, in your inbox

Follow Mobile platforms

Keep up with Mobile platforms in about 3 minutes a day: what actually shipped — the commits, pull requests, releases, and security advisories that matter.

or

One email a day. Unsubscribe in one click. Read a past issue →

Elsewhere on the wire

AI Agents AI Agents

CLINE FIXES ABORT-WINDOW PROMPT LOSS, CLIPBOARD IMAGES LAND ON DESKTOP

Cline's core agent now preserves queued prompts when you hit stop, and desktop users can finally paste screenshots directly into the composer.

dependabot malhotra5 Saoud Rizwan
ai-agents 40 shipped
Local LLMs Local LLMs

OLLAMA CUTS MODEL CONFIG BLOAT 100KB+ PER MODEL, LLAMA.CPP SHIPS TOOL ISOLATION AND CUDA FUSION GAINS

Ollama eliminated redundant manifest data ballooning config blobs on safetensors models, while llama.cpp landed docker-backed tool isolation and fused three GPU kernels into one.

Daniel Hiltgen github-actions[bot] grafail Isotr0py +7
llms 102 shipped
CachyOS @CachyOS

WIKI TRANSLATION PUSH HITS SPANISH AND PORTUGUESE, NVIDIA DRIVERS GET 7.2 SUPPORT

CachyOS documentation expands globally with AI-assisted Spanish and Portuguese updates while the core team hardens nvidia-470xx for kernel 7.2.

witchlliee github-actions Vasiliy Stelmachenok Vladislav Nepogodin +3
infra 73 shipped
Elixir & Phoenix Elixir & Phoenix

MACRO.TO_STRING BUG BREAKS FOR COMPREHENSIONS WITH TRAILING KEYWORDS

Elixir's Macro.to_string/1 silently corrupts for-comprehensions that use do-end blocks with non-block trailing keywords, rendering valid code that no longer compiles.

makoto-developer
elixir 2 shipped
Want every project, not just this one?