SwiftLang.assertion.swift

Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!"), function cast, file /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-700.0.52.2/src/llvm/include/llvm/Support/Casting.h, line 230.
0  swiftc                   0x000000010ae7dbbb llvm::sys::PrintStackTrace(__sFILE*) + 43
1  swiftc                   0x000000010ae7e2fb SignalHandler(int) + 379
2  libsystem_platform.dylib 0x00007fff86e96f1a _sigtramp + 26
3  libsystem_platform.dylib 0x00007fc1a070a980 _sigtramp + 428292736
4  libsystem_c.dylib        0x00007fff8dd979b3 abort + 129
5  libsystem_c.dylib        0x00007fff8dd5fa99 basename + 0
6  swiftc                   0x0000000108e796a2 swift::DependencyGraphImpl::loadFromBuffer(void const*, llvm::MemoryBuffer&) + 3090
7  swiftc                   0x0000000108e78a5f swift::DependencyGraphImpl::loadFromPath(void const*, llvm::StringRef) + 95
8  swiftc                   0x0000000108e727bf swift::driver::Compilation::performJobsImpl() + 1903
9  swiftc                   0x0000000108e75506 swift::driver::Compilation::performJobs() + 198
10 swiftc                   0x0000000108e39e06 main + 1462
11 libdyld.dylib            0x00007fff858145c9 start + 1
Stack dump:
0.    Program arguments: /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -incremental -module-name RxSwift -O -D TRACE_RESOURCES -sdk /Applications/