[Typed Throws]: Crash with SIL assertion when casting to error type

[jshier]

Description
When using the Typed Throws evolution toolchain, casting to an error type results in a SIL assertion.

Steps to reproduce

1. Clone the Alamofire feature/websocket-request-typed-throws branch. There will be an initial compiler failure due to Swift 5 not supporting typed catch:

Cannot convert value of type 'any Error' to expected argument type 'Serializer.Failure'

2. Add the suggested fixit, "Insert as! Serializer.Failure".

Expected behavior
Successful compilation, even if it's not really a correct fixit.

Actual behavior

SwiftCompile normal arm64 Compiling\ Request.swift /Users/jshier/Desktop/Code/Alamofire/Source/Request.swift (in target 'Alamofire macOS' from project 'Alamofire')
    cd /Users/jshier/Desktop/Code/Alamofire
    builtin-swiftTaskExecution -- /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/bin/swift-frontend -frontend -c /Users/jshier/Desktop/Code/Alamofire/Source/ParameterEncoding.swift /Users/jshier/Desktop/Code/Alamofire/Source/Protected.swift /Users/jshier/Desktop/Code/Alamofire/Source/ResponseSerialization.swift /Users/jshier/Desktop/Code/Alamofire/Source/Response.swift /Users/jshier/Desktop/Code/Alamofire/Source/Concurrency.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLConvertible+URLRequestConvertible.swift /Users/jshier/Desktop/Code/Alamofire/Source/RequestTaskMap.swift /Users/jshier/Desktop/Code/Alamofire/Source/AFError.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLSessionConfiguration+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/Result+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/AuthenticationInterceptor.swift /Users/jshier/Desktop/Code/Alamofire/Source/ParameterEncoder.swift /Users/jshier/Desktop/Code/Alamofire/Source/OperationQueue+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/HTTPHeaders.swift /Users/jshier/Desktop/Code/Alamofire/Source/HTTPMethod.swift /Users/jshier/Desktop/Code/Alamofire/Source/RedirectHandler.swift /Users/jshier/Desktop/Code/Alamofire/Source/Notifications.swift /Users/jshier/Desktop/Code/Alamofire/Source/Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLEncodedFormEncoder.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLRequest+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/MultipartFormData.swift /Users/jshier/Desktop/Code/Alamofire/Source/RequestCompression.swift /Users/jshier/Desktop/Code/Alamofire/Source/RequestInterceptor.swift /Users/jshier/Desktop/Code/Alamofire/Source/StringEncoding+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/DispatchQueue+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/ServerTrustEvaluation.swift /Users/jshier/Desktop/Code/Alamofire/Source/MultipartUpload.swift /Users/jshier/Desktop/Code/Alamofire/Source/CachedResponseHandler.swift /Users/jshier/Desktop/Code/Alamofire/Source/SessionDelegate.swift /Users/jshier/Desktop/Code/Alamofire/Source/NetworkReachabilityManager.swift /Users/jshier/Desktop/Code/Alamofire/Source/RetryPolicy.swift -primary-file /Users/jshier/Desktop/Code/Alamofire/Source/Request.swift /Users/jshier/Desktop/Code/Alamofire/Source/Combine.swift /Users/jshier/Desktop/Code/Alamofire/Source/Validation.swift /Users/jshier/Desktop/Code/Alamofire/Source/Session.swift /Users/jshier/Desktop/Code/Alamofire/Source/EventMonitor.swift /Users/jshier/Desktop/Code/Alamofire/Source/AlamofireExtended.swift -emit-dependencies-path /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Objects-normal/arm64/Request.d -emit-const-values-path /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Objects-normal/arm64/Request.swiftconstvalues -emit-reference-dependencies-path /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Objects-normal/arm64/Request.swiftdeps -serialize-diagnostics-path /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Objects-normal/arm64/Request.dia -target arm64-apple-macos10.12 -Xllvm -aarch64-use-tbi -enable-objc-interop -sdk /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk -I /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Products/Debug -F /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Products/Debug -no-color-diagnostics -application-extension -enable-testing -g -module-cache-path /Users/jshier/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity\=checked -Onone -D DEBUG -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins\#/Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins\#/Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-plugin-server -serialize-debugging-options -const-gather-protocols-file /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Objects-normal/arm64/Alamofire\ macOS_const_extract_protocols.json -enable-experimental-feature TypedThrows -enable-bare-slash-regex -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/jshier/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/jshier/Desktop/Code/Alamofire -resource-dir /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/lib/swift -enable-anonymous-context-mangled-names -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Alamofire-generated-files.hmap -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Alamofire-own-target-headers.hmap -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Alamofire-all-target-headers.hmap -Xcc -iquote -Xcc /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Alamofire-project-headers.hmap -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Products/Debug/include -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/DerivedSources-normal/arm64 -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/DerivedSources/arm64 -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/DerivedSources -Xcc -DDEBUG\=1 -module-name Alamofire -frontend-parseable-output -disable-clang-spi -target-sdk-version 14.2 -target-sdk-name macosx14.2 -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/lib/swift/host/plugins\#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/local/lib/swift/host/plugins\#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -plugin-path /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/local/lib/swift/host/plugins -o /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire\ macOS.build/Objects-normal/arm64/Request.o -index-unit-output-path /Alamofire.build/Debug/Alamofire\ macOS.build/Objects-normal/arm64/Request.o -index-store-path /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Index.noindex/DataStore -index-system-modules

Assertion failed: (destErrorType == SILType::getExceptionType(getASTContext())), function emitThrow, file SILGenStmt.cpp, line 1563.
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0.	Program arguments: /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/bin/swift-frontend -frontend -c /Users/jshier/Desktop/Code/Alamofire/Source/ParameterEncoding.swift /Users/jshier/Desktop/Code/Alamofire/Source/Protected.swift /Users/jshier/Desktop/Code/Alamofire/Source/ResponseSerialization.swift /Users/jshier/Desktop/Code/Alamofire/Source/Response.swift /Users/jshier/Desktop/Code/Alamofire/Source/Concurrency.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLConvertible+URLRequestConvertible.swift /Users/jshier/Desktop/Code/Alamofire/Source/RequestTaskMap.swift /Users/jshier/Desktop/Code/Alamofire/Source/AFError.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLSessionConfiguration+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/Result+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/AuthenticationInterceptor.swift /Users/jshier/Desktop/Code/Alamofire/Source/ParameterEncoder.swift /Users/jshier/Desktop/Code/Alamofire/Source/OperationQueue+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/HTTPHeaders.swift /Users/jshier/Desktop/Code/Alamofire/Source/HTTPMethod.swift /Users/jshier/Desktop/Code/Alamofire/Source/RedirectHandler.swift /Users/jshier/Desktop/Code/Alamofire/Source/Notifications.swift /Users/jshier/Desktop/Code/Alamofire/Source/Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLEncodedFormEncoder.swift /Users/jshier/Desktop/Code/Alamofire/Source/URLRequest+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/MultipartFormData.swift /Users/jshier/Desktop/Code/Alamofire/Source/RequestCompression.swift /Users/jshier/Desktop/Code/Alamofire/Source/RequestInterceptor.swift /Users/jshier/Desktop/Code/Alamofire/Source/StringEncoding+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/DispatchQueue+Alamofire.swift /Users/jshier/Desktop/Code/Alamofire/Source/ServerTrustEvaluation.swift /Users/jshier/Desktop/Code/Alamofire/Source/MultipartUpload.swift /Users/jshier/Desktop/Code/Alamofire/Source/CachedResponseHandler.swift /Users/jshier/Desktop/Code/Alamofire/Source/SessionDelegate.swift /Users/jshier/Desktop/Code/Alamofire/Source/NetworkReachabilityManager.swift /Users/jshier/Desktop/Code/Alamofire/Source/RetryPolicy.swift -primary-file /Users/jshier/Desktop/Code/Alamofire/Source/Request.swift /Users/jshier/Desktop/Code/Alamofire/Source/Combine.swift /Users/jshier/Desktop/Code/Alamofire/Source/Validation.swift /Users/jshier/Desktop/Code/Alamofire/Source/Session.swift /Users/jshier/Desktop/Code/Alamofire/Source/EventMonitor.swift /Users/jshier/Desktop/Code/Alamofire/Source/AlamofireExtended.swift -emit-dependencies-path "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Objects-normal/arm64/Request.d" -emit-const-values-path "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Objects-normal/arm64/Request.swiftconstvalues" -emit-reference-dependencies-path "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Objects-normal/arm64/Request.swiftdeps" -serialize-diagnostics-path "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Objects-normal/arm64/Request.dia" -target arm64-apple-macos10.12 -Xllvm -aarch64-use-tbi -enable-objc-interop -sdk /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk -I /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Products/Debug -F /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Products/Debug -no-color-diagnostics -application-extension -enable-testing -g -module-cache-path /Users/jshier/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity=checked -Onone -D DEBUG -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins#/Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins#/Applications/Xcode_15.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-plugin-server -serialize-debugging-options -const-gather-protocols-file "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Objects-normal/arm64/Alamofire macOS_const_extract_protocols.json" -enable-experimental-feature TypedThrows -enable-bare-slash-regex -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/jshier/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/jshier/Desktop/Code/Alamofire -resource-dir /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/lib/swift -enable-anonymous-context-mangled-names -Xcc "-I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/swift-overrides.hmap" -Xcc -iquote -Xcc "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Alamofire-generated-files.hmap" -Xcc "-I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Alamofire-own-target-headers.hmap" -Xcc "-I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Alamofire-all-target-headers.hmap" -Xcc -iquote -Xcc "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Alamofire-project-headers.hmap" -Xcc -I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Products/Debug/include -Xcc "-I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/DerivedSources-normal/arm64" -Xcc "-I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/DerivedSources/arm64" -Xcc "-I/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/DerivedSources" -Xcc -DDEBUG=1 -module-name Alamofire -frontend-parseable-output -disable-clang-spi -target-sdk-version 14.2 -target-sdk-name macosx14.2 -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/lib/swift/host/plugins#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/local/lib/swift/host/plugins#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/local/lib/swift/host/plugins#/Applications/Xcode_15.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -plugin-path /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Users/jshier/Library/Developer/Toolchains/swift-PR-69771-946.xctoolchain/usr/local/lib/swift/host/plugins -o "/Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Build/Intermediates.noindex/Alamofire.build/Debug/Alamofire macOS.build/Objects-normal/arm64/Request.o" -index-unit-output-path "/Alamofire.build/Debug/Alamofire macOS.build/Objects-normal/arm64/Request.o" -index-store-path /Users/jshier/Library/Developer/Xcode/DerivedData/Alamofire-gqexvpxfnitcltctvgfmsnsdspgw/Index.noindex/DataStore -index-system-modules
1.	Apple Swift version 5.11-dev (LLVM 3d6e0f96eb2caa2, Swift d4fa0e4f1bcbcc8)
2.	Compiling with the current language version
3.	While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "/Users/jshier/Desktop/Code/Alamofire/Source/Request.swift")
4.	While silgen emitFunction SIL function "@$s9Alamofire32DecodableWebSocketMessageDecoderV6decodeyxSo012NSURLSessioncD4TaskC10FoundationE0E0OAC5ErrorOyx_GYKF".
 for 'decode(_:)' (at /Users/jshier/Desktop/Code/Alamofire/Source/Request.swift:2136:12)
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  swift-frontend           0x000000010a241b04 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1  swift-frontend           0x000000010a240260 llvm::sys::RunSignalHandlers() + 112
2  swift-frontend           0x000000010a242154 SignalHandler(int) + 304
3  libsystem_platform.dylib 0x000000018d06ba24 _sigtramp + 56
4  libsystem_pthread.dylib  0x000000018d03ccc0 pthread_kill + 288
5  libsystem_c.dylib        0x000000018cf4ca40 abort + 180
6  libsystem_c.dylib        0x000000018cf4bd30 err + 0
7  swift-frontend           0x000000010a36acc4 swift::Lowering::SILGenFunction::emitThrow(swift::SILLocation, swift::Lowering::ManagedValue, bool) (.cold.15) + 0
8  swift-frontend           0x0000000105514dcc swift::Lowering::SILGenFunction::emitThrow(swift::SILLocation, swift::Lowering::ManagedValue, bool) + 1860
9  swift-frontend           0x0000000105511db4 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 7676
10 swift-frontend           0x0000000105511058 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 4256
11 swift-frontend           0x000000010550ffac swift::Lowering::SILGenFunction::emitStmt(swift::Stmt*) + 24
12 swift-frontend           0x00000001054ecab8 (anonymous namespace)::PatternMatchEmission::emitCaseBody(swift::CaseStmt*) + 56
13 swift-frontend           0x00000001054ed27c void llvm::function_ref<void ((anonymous namespace)::PatternMatchEmission&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, (anonymous namespace)::ClauseRow&)>::callback_fn<swift::Lowering::SILGenFunction::emitSwitchStmt(swift::SwitchStmt*)::$_0>(long, (anonymous namespace)::PatternMatchEmission&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, (anonymous namespace)::ClauseRow&) + 1772
14 swift-frontend           0x00000001054e3b98 (anonymous namespace)::PatternMatchEmission::emitDispatch((anonymous namespace)::ClauseMatrix&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, std::__1::function<void (swift::SILLocation)> const&) + 1924
15 swift-frontend           0x00000001054e2d40 swift::Lowering::SILGenFunction::emitSwitchStmt(swift::SwitchStmt*) + 3408
16 swift-frontend           0x000000010550ffac swift::Lowering::SILGenFunction::emitStmt(swift::Stmt*) + 24
17 swift-frontend           0x00000001054a6028 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 18820
18 swift-frontend           0x00000001054973b8 swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, std::__1::optional<swift::SILLocation>) + 248
19 swift-frontend           0x0000000105485aa0 swift::Lowering::SILGenFunction::emitPatternBinding(swift::PatternBindingDecl*, unsigned int, bool) + 1364
20 swift-frontend           0x0000000105485ccc swift::Lowering::SILGenFunction::visitPatternBindingDecl(swift::PatternBindingDecl*, bool) + 64
21 swift-frontend           0x0000000105510f5c swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 4004
22 swift-frontend           0x000000010550ffac swift::Lowering::SILGenFunction::emitStmt(swift::Stmt*) + 24
23 swift-frontend           0x00000001054b9c94 swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 472
24 swift-frontend           0x0000000105438938 swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) + 8720
25 swift-frontend           0x00000001054391d8 swift::Lowering::SILGenModule::emitOrDelayFunction(swift::SILDeclRef) + 224
26 swift-frontend           0x00000001054366f0 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 200
27 swift-frontend           0x0000000105521288 (anonymous namespace)::SILGenType::visitFuncDecl(swift::FuncDecl*) + 28
28 swift-frontend           0x000000010551e12c (anonymous namespace)::SILGenType::emitType() + 136
29 swift-frontend           0x000000010551e098 swift::Lowering::SILGenModule::visitNominalTypeDecl(swift::NominalTypeDecl*) + 24
30 swift-frontend           0x000000010543bc10 swift::ASTLoweringRequest::evaluate(swift::Evaluator&, swift::ASTLoweringDescriptor) const + 1024
31 swift-frontend           0x000000010550fa40 swift::SimpleRequest<swift::ASTLoweringRequest, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)9>::evaluateRequest(swift::ASTLoweringRequest const&, swift::Evaluator&) + 148
32 swift-frontend           0x000000010543eb9c llvm::Expected<swift::ASTLoweringRequest::OutputType> swift::Evaluator::getResultUncached<swift::ASTLoweringRequest>(swift::ASTLoweringRequest const&) + 396
33 swift-frontend           0x000000010543c5b8 swift::performASTLowering(swift::FileUnit&, swift::Lowering::TypeConverter&, swift::SILOptions const&, swift::IRGenOptions const*) + 96
34 swift-frontend           0x0000000104eae768 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 552
35 swift-frontend           0x0000000104ebdf90 withSemanticAnalysis(swift::CompilerInstance&, swift::FrontendObserver*, llvm::function_ref<bool (swift::CompilerInstance&)>, bool) + 160
36 swift-frontend           0x0000000104eb1380 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 704
37 swift-frontend           0x0000000104eb0344 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 2628
38 swift-frontend           0x0000000104ccbb74 swift::mainEntry(int, char const**) + 2192
39 dyld                     0x000000018ccc10e0 start + 2360