use slightly more idiomatic api for cfg

1 files changed, 6 insertions, 2 deletions

diff --git a/crates/ra_lsp_server/src/world.rs b/crates/ra_lsp_server/src/world.rs
index 27da751ab..0eb684de5 100644
--- a/crates/ra_lsp_server/src/world.rs
+++ b/crates/ra_lsp_server/src/world.rs
@@ -98,8 +98,12 @@ impl WorldState {
         }
 
         // FIXME: Read default cfgs from config
-        let default_cfg_options =
-            get_rustc_cfg_options().atom("test".into()).atom("debug_assertion".into());
+        let default_cfg_options = {
+            let mut opts = get_rustc_cfg_options();
+            opts.insert_atom("test".into());
+            opts.insert_atom("debug_assertion".into());
+            opts
+        };
 
         // Create crate graph from all the workspaces
         let mut crate_graph = CrateGraph::default();