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wire 2026-09-06
stories 30
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$ the-wire · showcase

Swift and Kotlin compiler fixes land, Flutter dependency rolls continue

By RepoJournal · Filed · About Mobile platforms

GrigoriiSolnyshkin engine-flutter-autoroll hjyamauchi eeckstein j-hui Hamish Knight
6 people shipped this
GrigoriiSolnyshkin @GrigoriiSolnyshkin 4 cited engine-flutter-autoroll @engine-flutter-autoroll 3 cited hjyamauchi @hjyamauchi 1 cited eeckstein @eeckstein 1 cited j-hui @j-hui 1 cited Hamish Knight @hamishknight

Swift fixes a C++ interop crash and extends an optimization, Kotlin begins a refactor of compiler-required arguments, and Flutter churns through routine dependency rolls.

Swift's C++ interop now imports templated static function members annotated as constructors via `SWIFT_NAME` without crashing. The patch updates `importGlobalAsInitializer` to support templates, fixing an assertion failure. [1] Separately, the `CopyToBorrowOptimization` now extends the borrow scope of the load's base reference before converting a `load [copy]` into a `load_borrow`, which "enables the optimization in more cases" and fixes invalid `load_borrow` creation when the base's borrow scope ends in a reborrow. [2] A new `MemoryLayout<T>.typedAllocationID` was merged for typed allocation, supporting Embedded Swift. [3]

Kotlin's compiler team is reworking how compiler-required annotation arguments are resolved. A new DSL declares parameters like name, annotation, position, and expected enum class; currently, only enums and strings are valid as compiler-required values. [4] The resolution logic was refactored [5] and reworked [6] to handle these arguments more cleanly. A test commit indicates non-literals in `JvmName` are now disallowed, though the behavior change is not yet part of a release. [7] This refactoring sets up future diagnostics for non-literal arguments on `Deprecated`'s `level` parameter.

Flutter's engine is running routine dependency rolls: Dart SDK to version 3.14.0-201.0.dev [8], Skia with a Vulkan-deps update [9], and the Fuchsia Linux SDK [10]. These are automated, low-risk updates.

Action items

References

  1. [1] [cxx-interop] Correctly import function templates as initializers ↗ apple/swift
  2. [2] CopyToBorrowOptimization: extend the borrow scope of the load's base reference ↗ apple/swift
  3. [3] Add MemoryLayout<T>.typedAllocationID for typed allocation / Embedded Swift (#91962) ↗ apple/swift
  4. [4] [FIR] Introduce small DSL to declare compiler-required annotation params ↗ JetBrains/kotlin
  5. [5] [FIR] Compiler required arguments refactor ↗ JetBrains/kotlin
  6. [6] [FIR] Rework resolution of compiler-required _arguments_ ↗ JetBrains/kotlin
  7. [7] [Tests] Fix compilation after disallowing non-literals in `JvmName` ↗ JetBrains/kotlin
  8. [8] Roll Dart SDK from 6882c3b4b542 to 77094991d1c1 (1 revision) (#192339) ↗ flutter/flutter
  9. [9] Roll Skia from 10652f9d64d6 to db200e27a634 (1 revision) (#192338) ↗ flutter/flutter
  10. [10] Roll Fuchsia Linux SDK from FgDQeF6jb1dVRVh3K... to _IgixhH4vEgdz9Oqn... (#192333) ↗ flutter/flutter

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

the week in review Flutter tool moves to constructor injection the month in review Swift and Flutter steady runtimes; Kotlin locks down builds
Topics: Mobile Full archive →

Quick answers

What shipped in Mobile platforms on September 6, 2026?
Swift fixes a C++ interop crash and extends an optimization, Kotlin begins a refactor of compiler-required arguments, and Flutter churns through routine dependency rolls. In total, 22 commits and 8 pull requests landed.
Who contributed to Mobile platforms on September 6, 2026?
6 developers shipped this update, including engine-flutter-autoroll, hjyamauchi, eeckstein, j-hui, Hamish Knight, and GrigoriiSolnyshkin.
What were the notable Mobile platforms updates?
[cxx-interop] Correctly import function templates as initializers, CopyToBorrowOptimization: extend the borrow scope of the load's base reference, and Add MemoryLayout<T>.typedAllocationID for typed allocation / Embedded Swift (#91962).
♥

$ log Mobile platforms --recent

Flutter engine rolls Skia and Fuchsia SDK 8 shipped Swift's async runtime paves way for per-function CPU control and macro-driven conformance 156 shipped Flutter fixes semantics geometry, UTF-16 deletion, iOS keyboard accents 160 shipped Flutter tool migrates Doctor, CustomDevices, and Install commands to constructor injection 164 shipped

$ log --all # elsewhere on the wire

Meta React Native adds Stable API guards to renderer attributed string FastAPI & Pydantic Pydantic fixes Mypy plugin crash, tightens datetime constraints

$ ls showcases/

Rails Django Laravel Node.js Go Vercel Vue.js Kubernetes HashiCorp Arch Linux Linux Anthropic

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