Move VSCode diagnostics workaroudn into client code

crates/rust-analyzer/src/main_loop.rs

@@ -327,29 +327,15 @@ impl GlobalState {
                     continue;
                 }
 
-                let url = file_id_to_url(&self.vfs.read().0, file_id);
-                let mut diagnostics =
+                let uri = file_id_to_url(&self.vfs.read().0, file_id);
+                let diagnostics =
                     self.diagnostics.diagnostics_for(file_id).cloned().collect::<Vec<_>>();
-                for d in &mut diagnostics {
-                    // https://github.com/rust-lang/rust-analyzer/issues/11404
-                    // FIXME: We should move this workaround into the client code
-                    if d.message.is_empty() {
-                        d.message = " ".to_string();
-                    }
-                    if let Some(rds) = d.related_information.as_mut() {
-                        for rd in rds {
-                            if rd.message.is_empty() {
-                                rd.message = " ".to_string();
-                            }
-                        }
-                    }
-                }
-                let version = from_proto::vfs_path(&url)
+                let version = from_proto::vfs_path(&uri)
                     .map(|path| self.mem_docs.get(&path).map(|it| it.version))
                     .unwrap_or_default();
 
                 self.send_notification::<lsp_types::notification::PublishDiagnostics>(
-                    lsp_types::PublishDiagnosticsParams { uri: url, diagnostics, version },
+                    lsp_types::PublishDiagnosticsParams { uri, diagnostics, version },
                 );
             }
         }

editors/code/src/client.ts

@@ -3,7 +3,7 @@ import * as vscode from "vscode";
 import * as ra from "../src/lsp_ext";
 import * as Is from "vscode-languageclient/lib/common/utils/is";
 import { assert } from "./util";
-import { WorkspaceEdit } from "vscode";
+import { Uri, WorkspaceEdit } from "vscode";
 import { Workspace } from "./ctx";
 import { updateConfig } from "./config";
 import { substituteVariablesInEnv } from "./config";
@@ -105,6 +105,15 @@ export async function createClient(
         traceOutputChannel: traceOutputChannel(),
         outputChannel: outputChannel(),
         middleware: {
+            async handleDiagnostics(uri, diagnostics, next) {
+                // Workaround for https://github.com/microsoft/vscode/issues/155531
+                for (const diagnostic of diagnostics) {
+                    if (!diagnostic.message) {
+                        diagnostic.message = " ";
+                    }
+                }
+                next(uri, diagnostics);
+            },
             async provideHover(
                 document: vscode.TextDocument,
                 position: vscode.Position,