Merge pull request swiftlang#84 from benlangmuir/tcup

Update recommended toolchain to 2019-02-14-a

Author: benlangmuir

Package.resolved

@@ -7,7 +7,7 @@ SourceKit-LSP is an implementation of the [Language Server Protocol](https://mic
 
 SourceKit-LSP is under heavy development! The best way to try it out is to build it from source. You will also need a Swift development toolchain and an editor that supports LSP.
 
-1. Install the `swift-DEVELOPMENT-SNAPSHOT-2019-01-22-a` toolchain snapshot from https://swift.org/download/#snapshots. Set the environment variable `SOURCEKIT_TOOLCHAIN_PATH` to the absolute path to the toolchain or otherwise configure your editor to use this toolchain. See [Toolchains](#toolchains) for more information.
+1. Install the `swift-DEVELOPMENT-SNAPSHOT-2019-02-14-a` toolchain snapshot from https://swift.org/download/#snapshots. Set the environment variable `SOURCEKIT_TOOLCHAIN_PATH` to the absolute path to the toolchain or otherwise configure your editor to use this toolchain. See [Toolchains](#toolchains) for more information.
 
 2. Build the language server executable `sourcekit-lsp` using `swift build`. See [Building](#building-sourcekit-lsp) for more information.
 
@@ -73,7 +73,7 @@ SourceKit-LSP depends on tools such as `sourcekitd` and `clangd`, which it loads
 
 ### Recommended Toolchain
 
-Use the `swift-DEVELOPMENT-SNAPSHOT-2019-01-22-a` toolchain snapshot from https://swift.org/download/#snapshots. SourceKit-LSP is still early in its development and we are actively adding functionality to the toolchain to support it.
+Use the `swift-DEVELOPMENT-SNAPSHOT-2019-02-14-a` toolchain snapshot from https://swift.org/download/#snapshots. SourceKit-LSP is still early in its development and we are actively adding functionality to the toolchain to support it.
 
 ### Selecting the Toolchain
 
@@ -104,7 +104,7 @@ SourceKit-LSP is still in early development, so you may run into rough edges wit
 | Feature | Status | Notes |
 |---------|:------:|-------|
 | Swift | ✅ | |
-| C/C++/ObjC | ❌ | [clangd](https://clang.llvm.org/extra/clangd.html) is not available in the recommended toolchain. You can try out C/C++/ObjC support by building clangd from source and putting it in `PATH`.
+| C/C++/ObjC | ❌ | As of `swift-DEVELOPMENT-SNAPSHOT-2019-02-14-a` [clangd](https://clang.llvm.org/extra/clangd.html) is available but hitting frequent assertion failures.
 | Code completion | ✅ | |
 | Quick Help (Hover) | ✅ | |
 | Diagnostics | ✅ | |

README.md

@@ -20,7 +20,7 @@ import XCTest
 final class LocalClangTests: XCTestCase {
 
   /// Whether to fail tests if clangd cannot be found.
-  static let requireClangd: Bool = false
+  static let requireClangd: Bool = true
 
   /// Whether clangd exists in the toolchain.
   var haveClangd: Bool = false