Daniil Kovalev 194199643f [AutoDiff] Fix assert on missing struct decl on cross-file derivative search (#77183) ...

Consider:

1. File struct.swift defining `struct Struct` with `static func max` member
2. File derivatives.swift defining `extension Struct` with custom derivative of the `max` function
3. File error.swift defining a differentiable function which uses `Struct.max`.

Previously, when passing error.swift as primary file and derivatives.swift as a secondary file to swift-frontend (and forgetting to pass struct.swift as a secondary file as well), an assertion failure was triggered.

This patch fixes the issue by adding a check against `ErrorType` in `findAutoDiffOriginalFunctionDecl` before calling `lookupMember`.

Co-authored-by: Anton Korobeynikov <anton@korobeynikov.info>

2024-10-29 02:20:50 -07:00

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Inputs

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error.swift

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main.swift

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