Panic proc macro srv if read request failed

Author: edwin0cheng

crates/ra_proc_macro_srv/src/cli.rs

@@ -8,8 +8,9 @@ pub fn run() {
     loop {
         let req = match read_request() {
             Err(err) => {
-                eprintln!("Read message error on ra_proc_macro_srv: {}", err);
-                continue;
+                // Panic here, as the stdin pipe may be closed.
+                // Otherwise, client will be restart the service anyway.
+                panic!("Read message error on ra_proc_macro_srv: {}", err);
             }
             Ok(None) => continue,
             Ok(Some(req)) => req,