Open Radar

 
Summary:
If you have a project that links a pre-compiled Swift module (specifically a static framework in the attached sample project), the project will build successfully, but if you try to jump to definition on a symbol or the import from the pre-compiled module, you get this error:

```
Couldn't Generate Swift Representation

Error (from SourceKit):
"Could not load module: MODULE"
```

Steps to Reproduce:
1. Pre-compile a Swift static framework in 1 project
2. Create a new project, copy the pre-compiled framework to the root of the project
3. Add `$(SRCROOT)` to `FRAMEWORK_SEARCH_PATHS` in Build Settings
4. Add `-framework MODULE` to `OTHER_LDFLAGS`
5. Add an import, and a reference to the symbols from the pre-compiled framework
6. Build (this should be successfully)
7. Try to jump to definition on the import, or any of the referenced symbols

Expected Results:
You see a generated representation of Swift module

Actual Results:
You get the above error

Version:
Xcode 10.0 beta 3 (10L201y)

Notes:
- See the attached project for an example (this Swift framework was built with Xcode 10 beta 3, so you must use the same version to reproduce this)
- In Xcode 9.4.1 jumping to definition in this case works