completion: Don't panic on timeout/no result, just do nothing.

helix-term/src/commands.rs

@@ -851,8 +851,10 @@ pub fn completion(cx: &mut Context) {
             .timeout(Duration::from_secs(2)),
     )
     .expect("completion failed!")
-    .expect("completion failed!");
+    .unwrap_or_default(); // if timeout, just return
 
+    // TODO: if no completion, show some message or something
+    if !res.is_empty() {
         let picker = ui::Picker::new(
             res,
             |item| {
@@ -876,6 +878,8 @@ pub fn completion(cx: &mut Context) {
             },
         ));
 
-    // TODO: when iterating over items, show the docs in popup
+        // TODO!: when iterating over items, show the docs in popup
+
         // language server client needs to be accessible via a registry of some sort
     }
+}