skip over paths which failed to canonicalize

src/filesystem.rs

@@ -144,7 +144,7 @@ fn rescan_vault_inner<D: Borrow<UpEndDatabase>>(
         .follow_links(true)
         .into_iter()
         .filter_map(|e| e.ok())
-        .map(|e| fs::canonicalize(e.into_path()).unwrap())
+        .filter_map(|e| fs::canonicalize(e.into_path()).ok())
         .filter(|e| e.is_file())
         .filter(|e| !e.starts_with(&absolute_dir_path.join(UPEND_SUBDIR)))
         .collect();