Compiler crash when evaluating key path in a generic type #85110
Description
Description
I've encountered an issue which results in what appears to be a compiler crash. I've included a sample project to illustrate the problem and the workaround. I've tried this on Xcode 26.0 and the latest beta 3 of Xcode 26.1 which includes swift version 6.2.1.4.6.
The issue seems to stem from using a key path of an embedded type within a parent generic type. The example does use TCA which includes some macro usage so that would also be the culprit.
Reproduction
See the attached sample project.
Expected behavior
To show the correct error.
Environment
swift-driver version: 1.127.14.1 Apple Swift version 6.2.1 (swiftlang-6.2.1.4.6 clang-1700.4.4.1)
Target: arm64-apple-macosx26.0
- the version released in Xcode 26.0