diff --git a/crates/ra_lsp_server/src/main.rs b/crates/ra_lsp_server/src/main.rs
index 1a2ab1bc2f..36d4898bd9 100644
--- a/crates/ra_lsp_server/src/main.rs
+++ b/crates/ra_lsp_server/src/main.rs
@@ -48,9 +48,12 @@ fn main_inner() -> Result<()> {
 
         let opts = params
             .initialization_options
-            .and_then(|v| ServerConfig::deserialize(v).ok())
+            .and_then(|v| {
+                ServerConfig::deserialize(v)
+                    .map_err(|e| log::error!("failed to deserialize config: {}", e))
+                    .ok()
+            })
             .unwrap_or_default();
-
         ra_lsp_server::main_loop(workspace_roots, params.capabilities, opts, r, s)
     })?;
     log::info!("shutting down IO...");
diff --git a/crates/ra_lsp_server/src/main_loop.rs b/crates/ra_lsp_server/src/main_loop.rs
index 3ee0ad6522..fcb7823861 100644
--- a/crates/ra_lsp_server/src/main_loop.rs
+++ b/crates/ra_lsp_server/src/main_loop.rs
@@ -586,6 +586,7 @@ fn update_file_notifications_on_threadpool(
     sender: Sender<Task>,
     subscriptions: Vec<FileId>,
 ) {
+    log::trace!("updating notifications for {:?}", subscriptions);
     pool.execute(move || {
         for file_id in subscriptions {
             match handlers::publish_diagnostics(&world, file_id) {
diff --git a/editors/code/package.json b/editors/code/package.json
index 48ab886bf8..98faf538f2 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -199,7 +199,7 @@
                 },
                 "rust-analyzer.excludeGlobs": {
                     "type": "array",
-                    "default": "[]",
+                    "default": [],
                     "description": "Paths to exclude from analysis"
                 },
                 "rust-analyzer.cargo-watch.arguments": {