$ cat ~/Desktop/test.swift
public enum Endpoint {
    case popular

    func path() -> String {
        switch self {
        case .popular:
            return "movie/popular"
        }
    }
}
$ ./sourcekitd-test -req=typecontextinfo -offset=88  ~/Desktop/test.swift -- ~/Desktop/test.swift == -req=typecontextinfo -offset=133  ~/Desktop/test.swift -- ~/Desktop/test.swift
{
  key.request: source.request.configuration.global,
  key.optimize_for_ide: 1
}
{
  key.request: source.request.typecontextinfo,
  key.compilerargs: [
    "/Users/alex/Desktop/test.swift"
  ],
  key.offset: 88,
  key.sourcefile: "/Users/alex/Desktop/test.swift"
}
/Users/alex/Desktop/test.swift:6:14: error: extraneous '.' in enum 'case' declaration
        case .popular:
             ^
             
/Users/alex/Desktop/test.swift:6:9: error: 'case' label can only appear inside a 'switch' statement
        case .popular:
        ^
{
  key.results: [
  ]
}
{
  key.request: source.request.typecontextinfo,
  key.compilerargs: [
    "/Users/alex/Desktop/test.swift"
  ],
  key.offset: 133,
  key.sourcefile: "/Users/alex/Desktop/test.swift"
}
Assertion failed: (is<T>() && "Invalid accessor called"), function get, file /Users/alex/swift-src/llvm-project/llvm/include/llvm/ADT/PointerUnion.h, line 188.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace.
Stack dump:
0.  While performing cached completion if possible
1.  While performing cached completion in decl context:
    ---
    0x7fde25029200 Module name=test
      0x7fde250295b8 FileUnit file="/Users/alex/Desktop/test.swift"
        0x7fde25029a08 EnumDecl name=Endpoint
          0x7fde25029c50 AbstractFunctionDecl name=path() : (no type set)
    ---
2.  While evaluating request CodeCompletionSecondPassRequest(source_file "/Users/alex/Desktop/test.swift", )
3.  While evaluating request TypeCheckASTNodeAtLocRequest(0x7fde25029c50 AbstractFunctionDecl name=path() : (no type set), )
4.  While type-checking statement at [/Users/alex/Desktop/test.swift:7:13 - line:7:20] RangeText="return "