Who contributed to Mobile platforms on June 1, 2026?

2 developers shipped this update, including tshortli and eeckstein.

What were the notable Mobile platforms updates?

SILGen: Fix 'multiple definitions' error for funcs nested in `@backDeployed` funcs, embedded: allow finite specialization loops up to a larger limit, and Inliner: fix a ownership violation when inlining a begin_apply into a dead-end block.

Mobile platforms

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

Pick a date

Topics: Mobile Full archive →

The Wire · Showcase

SWIFT COMPILER FIXES NESTED FUNCTION CORRUPTION IN BACKDEPLOYED CODE

By RepoJournal · Filed 06:04 UTC on June 1, 2026 · About Mobile platforms

2 people shipped this

eeckstein @eeckstein 2 cited

tshortli @tshortli 1 cited

Swift's SILGen pipeline was silently emitting duplicate nested functions when processing `@backDeployed` declarations, causing build failures that looked impossible to debug.

The top priority fix lands in Swift's SILGen phase, which handles intermediate language generation [1]. When a function marked `@backDeployed` gets compiled, its body is emitted twice - once for the original and once for the fallback that runs on older OS versions. Named nested functions inside that body were getting duplicate definitions, while closures worked fine because they already had deduplication logic. This is fixed now, unblocking developers using `@backDeployed` with local function declarations.

On the embedded Swift front, a false error is resolved that was rejecting legitimate generic specialization loops [2]. The compiler now allows specialization chains up to a depth of 10 instead of 1, which matches real-world usage patterns without opening the door to infinite loops. This removes friction from embedded projects that were hitting artificial constraints.

Two additional ownership violations surfaced in the inliner when handling dead-end control flow [3]. The lifetime completion ordering issue caused `end_borrow` to be inserted after `destroy_value [dead_end]` on the same value, violating Swift's ownership model. This is now corrected.

On the Kotlin side, Atomicfu's type parameter generation has been fixed to prevent out-of-scope references [4], addressing KT-69305 and clearing the path for atomic operations in more complex generic contexts.

Action items

→ Sync Swift compiler if you maintain `@backDeployed` APIs or embedded Swift projects apple/swift [plan]
→ Monitor Kotlin/Atomicfu for the next release with KT-69305 included JetBrains/kotlin [monitor]

References

[1] SILGen: Fix 'multiple definitions' error for funcs nested in `@backDeployed` funcs ↗ apple/swift
[2] embedded: allow finite specialization loops up to a larger limit ↗ apple/swift
[3] Inliner: fix a ownership violation when inlining a begin_apply into a dead-end block ↗ apple/swift
[4] [Atomicfu] Fix out-of-scope type parameters generation JetBrains/kotlin

Quick answers

What shipped in Mobile platforms on June 1, 2026?: Swift's SILGen pipeline was silently emitting duplicate nested functions when processing `@backDeployed` declarations, causing build failures that looked impossible to debug. In total, 5 commits and 3 pull requests landed.
Who contributed to Mobile platforms on June 1, 2026?: 2 developers shipped this update, including tshortli and eeckstein.
What were the notable Mobile platforms updates?: SILGen: Fix 'multiple definitions' error for funcs nested in `@backDeployed` funcs, embedded: allow finite specialization loops up to a larger limit, and Inliner: fix a ownership violation when inlining a begin_apply into a dead-end block.

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.

+11

mobile 147 shipped 2-min read

Mobile platforms 4 days ago

KOTLIN RIPS OUT INTERPRETER GUTS, FLUTTER PATCHES RENDERING PIPELINE

Kotlin is systematically removing its IR interpreter in a multi-commit cleanup that signals a major shift in how the compiler handles intermediate representation, while Flutter ships critical Vulkan safety fixes and expands autofill support.

mobile 115 shipped 2-min read

Mobile platforms 6 days ago

SWIFT COMPILER DROPS DECADE-OLD INTEROP WORKAROUND, REIMPLEMENTS CORE OPTIMIZER IN PURE SWIFT

Swift's ClangImporter finally stopped stripping type aliases that have been unnecessary since 2014, while the compiler's foundational SSAUpdater moved entirely off C++ dependencies.

mobile 28 shipped 1-min read

Mobile platforms 12 days ago

FLUTTER CLEANS HOUSE ON ANALYSIS RULES WHILE SWIFT FIXES C-INTEROP CRASHES

Flutter is migrating away from deprecated strict analysis modes in favor of lint rules, while Swift patches critical crashes in bit-field accessors and C interoperability.

mobile 21 shipped 1-min read

Elsewhere on the wire

AI Agents about 5 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 5 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.