Swift 6 strict concurrency: new Sendability mismatch in `AdaptyUIBuilderLogic.makePurchase(...)`

[derkachev19]

Description

Summary

After upgrading my toolchain to Xcode 26.2 and Tuist 4.138.0, I started seeing the following compilation error. I’m not sure whether Tuist affects this, but the failure happens during Swift compilation (strict concurrency / Sendability).

Two related Swift 6 / concurrency issues were previously discussed here:

• v3.3.1 Doesn't compile on Xcode 16.0 #106
• Call to main actor-isolated initializer 'init()' in a synchronous nonisolated context #124

Those were addressed / had workarounds (e.g. compiling some targets in Swift 6 mode). However, now I’m seeing a third error and the previous workaround is no longer sufficient.

I prepared a minimal repro project.

Demo project

https://github.com/derkachev19/Adapty-build-issue

Environment

• Xcode: 26.2
• Swift compiler: 6.2.3 (swift-driver 1.127.14.1, swiftlang-6.2.3.3.21 clang-1700.6.3.2)
• Swift tools version: 5.9 (from // swift-tools-version: 5.9)
• iOS deployment target: 17.0
• Dependency manager: SwiftPM (workspace generated by Tuist)
• Tuist: 4.138.0
• AdaptySDK-iOS: 3.15.0 (pinned)
• Affected products: Adapty + AdaptyUI

Steps to reproduce

1. cd <reproFolder>
2. mise install
3. tuist install
4. tuist generate
5. Build the ExampleApp

✅ Expected: the project builds successfully.

❌ Actual: the project does not build - compilation fails with a Swift strict concurrency / Sendability error (see the error message/screenshot above).

Adapty SDK Version

3.15.0

SDK installation method

Swift Package Manager

Xcode Project Swift Version

5.9

Xcode Version

26.2

iOS Version

26.2

Device Type(s)

Both

[x401om]

Hi @derkachev19! Thank you for the issue, our team will investigate.

[derkachev19]

Hi @x401om! Any updates on this? It’s currently blocking us from fully using Adapty across our products. Thanks!