12 files changed, 61 insertions, 44 deletions

diff --git a/crates/gen_lsp_server/Cargo.toml b/crates/gen_lsp_server/Cargo.toml
index afeeb1513..2aee4ea16 100644
--- a/crates/gen_lsp_server/Cargo.toml
+++ b/crates/gen_lsp_server/Cargo.toml
@@ -13,4 +13,4 @@ log = "0.4.3"
 failure = "0.1.2"
 serde_json = "1.0.24"
 serde = { version = "1.0.83", features = ["derive"] }
-crossbeam-channel = "0.2.4"
+crossbeam-channel = "0.3.5"
diff --git a/crates/gen_lsp_server/src/lib.rs b/crates/gen_lsp_server/src/lib.rs
index 8779fbf0f..b20652928 100644
--- a/crates/gen_lsp_server/src/lib.rs
+++ b/crates/gen_lsp_server/src/lib.rs
@@ -95,7 +95,7 @@ pub fn run_server(
     server(params, &receiver, &sender)?;
     log::info!("lsp server waiting for exit notification");
     match receiver.recv() {
-        Some(RawMessage::Notification(n)) => n
+        Ok(RawMessage::Notification(n)) => n
             .cast::<Exit>()
             .map_err(|n| format_err!("unexpected notification during shutdown: {:?}", n))?,
         m => bail!("unexpected message during shutdown: {:?}", m),
@@ -109,7 +109,7 @@ pub fn handle_shutdown(req: RawRequest, sender: &Sender<RawMessage>) -> Option<R
     match req.cast::<Shutdown>() {
         Ok((id, ())) => {
             let resp = RawResponse::ok::<Shutdown>(id, &());
-            sender.send(RawMessage::Response(resp));
+            let _ = sender.send(RawMessage::Response(resp));
             None
         }
         Err(req) => Some(req),
@@ -122,16 +122,16 @@ fn initialize(
     caps: ServerCapabilities,
 ) -> Result<InitializeParams> {
     let (id, params) = match receiver.recv() {
-        Some(RawMessage::Request(req)) => match req.cast::<Initialize>() {
+        Ok(RawMessage::Request(req)) => match req.cast::<Initialize>() {
             Err(req) => bail!("expected initialize request, got {:?}", req),
             Ok(req) => req,
         },
         msg => bail!("expected initialize request, got {:?}", msg),
     };
     let resp = RawResponse::ok::<Initialize>(id, &InitializeResult { capabilities: caps });
-    sender.send(RawMessage::Response(resp));
+    sender.send(RawMessage::Response(resp)).unwrap();
     match receiver.recv() {
-        Some(RawMessage::Notification(n)) => {
+        Ok(RawMessage::Notification(n)) => {
             n.cast::<Initialized>()
                 .map_err(|_| format_err!("expected initialized notification"))?;
         }
diff --git a/crates/gen_lsp_server/src/stdio.rs b/crates/gen_lsp_server/src/stdio.rs
index 35d8e46d0..5c8e33854 100644
--- a/crates/gen_lsp_server/src/stdio.rs
+++ b/crates/gen_lsp_server/src/stdio.rs
@@ -9,11 +9,13 @@ use failure::bail;
 use crate::{RawMessage, Result};
 
 pub fn stdio_transport() -> (Receiver<RawMessage>, Sender<RawMessage>, Threads) {
-    let (writer_sender, mut writer_receiver) = bounded::<RawMessage>(16);
+    let (writer_sender, writer_receiver) = bounded::<RawMessage>(16);
     let writer = thread::spawn(move || {
         let stdout = stdout();
         let mut stdout = stdout.lock();
-        writer_receiver.try_for_each(|it| it.write(&mut stdout))?;
+        writer_receiver
+            .into_iter()
+            .try_for_each(|it| it.write(&mut stdout))?;
         Ok(())
     });
     let (reader_sender, reader_receiver) = bounded::<RawMessage>(16);
@@ -21,7 +23,9 @@ pub fn stdio_transport() -> (Receiver<RawMessage>, Sender<RawMessage>, Threads)
         let stdin = stdin();
         let mut stdin = stdin.lock();
         while let Some(msg) = RawMessage::read(&mut stdin)? {
-            reader_sender.send(msg);
+            if let Err(_) = reader_sender.send(msg) {
+                break;
+            }
         }
         Ok(())
     });
diff --git a/crates/ra_lsp_server/Cargo.toml b/crates/ra_lsp_server/Cargo.toml
index b1a4cdaa1..22a26b844 100644
--- a/crates/ra_lsp_server/Cargo.toml
+++ b/crates/ra_lsp_server/Cargo.toml
@@ -13,7 +13,7 @@ failure_derive = "0.1.2"
 serde_json = "1.0.24"
 serde = "1.0.83"
 drop_bomb = "0.1.0"
-crossbeam-channel = "0.2.4"
+crossbeam-channel = "0.3.5"
 flexi_logger = "0.10.0"
 log = "0.4.3"
 url_serde = "0.2.0"
diff --git a/crates/ra_lsp_server/src/main_loop.rs b/crates/ra_lsp_server/src/main_loop.rs
index 97c1be778..3ebae4ecd 100644
--- a/crates/ra_lsp_server/src/main_loop.rs
+++ b/crates/ra_lsp_server/src/main_loop.rs
@@ -7,7 +7,7 @@ use std::{
     sync::Arc,
 };
 
-use crossbeam_channel::{unbounded, select, Receiver, Sender};
+use crossbeam_channel::{unbounded, select, Receiver, Sender, RecvError};
 use gen_lsp_server::{
     handle_shutdown, ErrorCode, RawMessage, RawNotification, RawRequest, RawResponse,
 };
@@ -62,7 +62,7 @@ pub fn main_loop(
     let (task_sender, task_receiver) = unbounded::<Task>();
     let (ws_worker, ws_watcher) = workspace_loader();
 
-    ws_worker.send(ws_root.clone());
+    ws_worker.send(ws_root.clone()).unwrap();
     // FIXME: support dynamic workspace loading.
     let workspaces = match ws_worker.recv().unwrap() {
         Ok(ws) => vec![ws],
@@ -95,7 +95,9 @@ pub fn main_loop(
     );
 
     log::info!("waiting for tasks to finish...");
-    task_receiver.for_each(|task| on_task(task, msg_sender, &mut pending_requests));
+    task_receiver
+        .into_iter()
+        .for_each(|task| on_task(task, msg_sender, &mut pending_requests));
     log::info!("...tasks have finished");
     log::info!("joining threadpool...");
     drop(pool);
@@ -170,16 +172,16 @@ fn main_loop_inner(
     loop {
         log::trace!("selecting");
         let event = select! {
-            recv(msg_receiver, msg) => match msg {
-                Some(msg) => Event::Msg(msg),
-                None => bail!("client exited without shutdown"),
+            recv(msg_receiver) -> msg => match msg {
+                Ok(msg) => Event::Msg(msg),
+                Err(RecvError) => bail!("client exited without shutdown"),
             },
-            recv(task_receiver, task) => Event::Task(task.unwrap()),
-            recv(state.vfs.read().task_receiver(), task) => match task {
-                None => bail!("vfs died"),
-                Some(task) => Event::Vfs(task),
-            }
-            recv(libdata_receiver, data) => Event::Lib(data.unwrap())
+            recv(task_receiver) -> task => Event::Task(task.unwrap()),
+            recv(state.vfs.read().task_receiver()) -> task => match task {
+                Ok(task) => Event::Vfs(task),
+                Err(RecvError) => bail!("vfs died"),
+            },
+            recv(libdata_receiver) -> data => Event::Lib(data.unwrap())
         };
         log::info!("loop_turn = {:?}", event);
         let start = std::time::Instant::now();
@@ -209,7 +211,7 @@ fn main_loop_inner(
                                 ErrorCode::MethodNotFound as i32,
                                 "unknown request".to_string(),
                             );
-                            msg_sender.send(RawMessage::Response(resp))
+                            msg_sender.send(RawMessage::Response(resp)).unwrap()
                         }
                     }
                 }
@@ -229,7 +231,7 @@ fn main_loop_inner(
                 log::info!("indexing {:?} ... ", root);
                 let data = LibraryData::prepare(root, files);
                 log::info!("indexed {:?} {:?}", start.elapsed(), root);
-                sender.send(data);
+                sender.send(data).unwrap();
             });
         }
         if state.roots_to_scan == 0 {
@@ -253,10 +255,12 @@ fn on_task(task: Task, msg_sender: &Sender<RawMessage>, pending_requests: &mut F
     match task {
         Task::Respond(response) => {
             if pending_requests.remove(&response.id) {
-                msg_sender.send(RawMessage::Response(response))
+                msg_sender.send(RawMessage::Response(response)).unwrap();
             }
         }
-        Task::Notify(n) => msg_sender.send(RawMessage::Notification(n)),
+        Task::Notify(n) => {
+            msg_sender.send(RawMessage::Notification(n)).unwrap();
+        }
     }
 }
 
@@ -328,7 +332,7 @@ fn on_notification(
                     ErrorCode::RequestCancelled as i32,
                     "canceled by client".to_string(),
                 );
-                msg_sender.send(RawMessage::Response(response))
+                msg_sender.send(RawMessage::Response(response)).unwrap()
             }
             return Ok(());
         }
@@ -381,7 +385,7 @@ fn on_notification(
                 diagnostics: Vec::new(),
             };
             let not = RawNotification::new::<req::PublishDiagnostics>(&params);
-            msg_sender.send(RawMessage::Notification(not));
+            msg_sender.send(RawMessage::Notification(not)).unwrap();
             return Ok(());
         }
         Err(not) => not,
@@ -441,7 +445,7 @@ impl<'a> PoolDispatcher<'a> {
                         },
                     };
                     let task = Task::Respond(resp);
-                    sender.send(task);
+                    sender.send(task).unwrap();
                 });
                 self.res = Some(id);
             }
@@ -476,7 +480,7 @@ fn update_file_notifications_on_threadpool(
                 }
                 Ok(params) => {
                     let not = RawNotification::new::<req::PublishDiagnostics>(&params);
-                    sender.send(Task::Notify(not));
+                    sender.send(Task::Notify(not)).unwrap();
                 }
             }
             if publish_decorations {
@@ -488,7 +492,7 @@ fn update_file_notifications_on_threadpool(
                     }
                     Ok(params) => {
                         let not = RawNotification::new::<req::PublishDecorations>(&params);
-                        sender.send(Task::Notify(not))
+                        sender.send(Task::Notify(not)).unwrap();
                     }
                 }
             }
@@ -501,7 +505,7 @@ fn feedback(intrnal_mode: bool, msg: &str, sender: &Sender<RawMessage>) {
         return;
     }
     let not = RawNotification::new::<req::InternalFeedback>(&msg.to_string());
-    sender.send(RawMessage::Notification(not));
+    sender.send(RawMessage::Notification(not)).unwrap();
 }
 
 fn is_canceled(e: &failure::Error) -> bool {
diff --git a/crates/ra_lsp_server/src/project_model.rs b/crates/ra_lsp_server/src/project_model.rs
index 5852a157d..ae2149463 100644
--- a/crates/ra_lsp_server/src/project_model.rs
+++ b/crates/ra_lsp_server/src/project_model.rs
@@ -204,8 +204,10 @@ pub fn workspace_loader() -> (Worker<PathBuf, Result<CargoWorkspace>>, WorkerHan
         1,
         |input_receiver, output_sender| {
             input_receiver
+                .into_iter()
                 .map(|path| CargoWorkspace::from_cargo_metadata(path.as_path()))
-                .for_each(|it| output_sender.send(it))
+                .try_for_each(|it| output_sender.send(it))
+                .unwrap()
         },
     )
 }
diff --git a/crates/ra_lsp_server/tests/heavy_tests/support.rs b/crates/ra_lsp_server/tests/heavy_tests/support.rs
index 0f7152140..7db168b0f 100644
--- a/crates/ra_lsp_server/tests/heavy_tests/support.rs
+++ b/crates/ra_lsp_server/tests/heavy_tests/support.rs
@@ -118,7 +118,11 @@ impl Server {
     }
     fn send_request_(&self, r: RawRequest) -> Value {
         let id = r.id;
-        self.worker.as_ref().unwrap().send(RawMessage::Request(r));
+        self.worker
+            .as_ref()
+            .unwrap()
+            .send(RawMessage::Request(r))
+            .unwrap();
         while let Some(msg) = self.recv() {
             match msg {
                 RawMessage::Request(req) => panic!("unexpected request: {:?}", req),
@@ -167,7 +171,8 @@ impl Server {
         self.worker
             .as_ref()
             .unwrap()
-            .send(RawMessage::Notification(not));
+            .send(RawMessage::Notification(not))
+            .unwrap();
     }
 }
 
@@ -185,7 +190,7 @@ impl Drop for Server {
 fn recv_timeout(receiver: &Receiver<RawMessage>) -> Option<RawMessage> {
     let timeout = Duration::from_secs(5);
     select! {
-        recv(receiver, msg) => msg,
-        recv(after(timeout)) => panic!("timed out"),
+        recv(receiver) -> msg => msg.ok(),
+        recv(after(timeout)) -> _ => panic!("timed out"),
     }
 }
diff --git a/crates/ra_vfs/Cargo.toml b/crates/ra_vfs/Cargo.toml
index ccea8a866..7c170cdfc 100644
--- a/crates/ra_vfs/Cargo.toml
+++ b/crates/ra_vfs/Cargo.toml
@@ -8,7 +8,7 @@ authors = ["Aleksey Kladov <[email protected]>"]
 walkdir = "2.2.7"
 relative-path = "0.4.0"
 rustc-hash = "1.0"
-crossbeam-channel = "0.2.4"
+crossbeam-channel = "0.3.5"
 log = "0.4.6"
 
 thread_worker = { path = "../thread_worker" }
diff --git a/crates/ra_vfs/src/io.rs b/crates/ra_vfs/src/io.rs
index 4cfdb83da..80328ad18 100644
--- a/crates/ra_vfs/src/io.rs
+++ b/crates/ra_vfs/src/io.rs
@@ -32,8 +32,10 @@ pub(crate) type Worker = thread_worker::Worker<Task, TaskResult>;
 pub(crate) fn start() -> (Worker, WorkerHandle) {
     thread_worker::spawn("vfs", 128, |input_receiver, output_sender| {
         input_receiver
+            .into_iter()
             .map(handle_task)
-            .for_each(|it| output_sender.send(it))
+            .try_for_each(|it| output_sender.send(it))
+            .unwrap()
     })
 }
 
diff --git a/crates/ra_vfs/src/lib.rs b/crates/ra_vfs/src/lib.rs
index 90d5e21f4..757eac95b 100644
--- a/crates/ra_vfs/src/lib.rs
+++ b/crates/ra_vfs/src/lib.rs
@@ -148,7 +148,7 @@ impl Vfs {
                 path: path.clone(),
                 filter: Box::new(filter),
             };
-            res.worker.inp.send(task);
+            res.worker.inp.send(task).unwrap();
         }
         let roots = res.roots.iter().map(|(id, _)| id).collect();
         (res, roots)
diff --git a/crates/thread_worker/Cargo.toml b/crates/thread_worker/Cargo.toml
index 62d66a1a3..c74b376e2 100644
--- a/crates/thread_worker/Cargo.toml
+++ b/crates/thread_worker/Cargo.toml
@@ -6,6 +6,6 @@ authors = ["Aleksey Kladov <[email protected]>"]
 
 [dependencies]
 drop_bomb = "0.1.0"
-crossbeam-channel = "0.2.4"
+crossbeam-channel = "0.3.5"
 log = "0.4.3"
 
diff --git a/crates/thread_worker/src/lib.rs b/crates/thread_worker/src/lib.rs
index 12e8bf17e..5e46f62fe 100644
--- a/crates/thread_worker/src/lib.rs
+++ b/crates/thread_worker/src/lib.rs
@@ -2,7 +2,7 @@
 
 use std::thread;
 
-use crossbeam_channel::{bounded, unbounded, Receiver, Sender};
+use crossbeam_channel::{bounded, unbounded, Receiver, Sender, RecvError, SendError};
 use drop_bomb::DropBomb;
 
 pub struct Worker<I, O> {
@@ -34,10 +34,10 @@ impl<I, O> Worker<I, O> {
         self.out
     }
 
-    pub fn send(&self, item: I) {
+    pub fn send(&self, item: I) -> Result<(), SendError<I>> {
         self.inp.send(item)
     }
-    pub fn recv(&self) -> Option<O> {
+    pub fn recv(&self) -> Result<O, RecvError> {
         self.out.recv()
     }
 }