3 files changed, 12 insertions, 2 deletions

diff --git a/crates/ra_ide_api/src/change.rs b/crates/ra_ide_api/src/change.rs
index 895b1e966..8d9918d16 100644
--- a/crates/ra_ide_api/src/change.rs
+++ b/crates/ra_ide_api/src/change.rs
@@ -163,7 +163,8 @@ impl RootDatabase {
         if !change.new_roots.is_empty() {
             let mut local_roots = Vec::clone(&self.local_roots());
             for (root_id, is_local) in change.new_roots {
-                self.set_source_root(root_id, Default::default());
+                let root = if is_local { SourceRoot::new() } else { SourceRoot::new_library() };
+                self.set_source_root(root_id, Arc::new(root));
                 if is_local {
                     local_roots.push(root_id);
                 }
diff --git a/crates/ra_ide_api/src/completion/complete_postfix.rs b/crates/ra_ide_api/src/completion/complete_postfix.rs
index 278b1b797..e20a12e2a 100644
--- a/crates/ra_ide_api/src/completion/complete_postfix.rs
+++ b/crates/ra_ide_api/src/completion/complete_postfix.rs
@@ -51,6 +51,8 @@ pub(super) fn complete_postfix(acc: &mut Completions, ctx: &CompletionContext) {
         )
         .add_to(acc);
         postfix_snippet(ctx, "dbg", "dbg!(expr)", &format!("dbg!({})", receiver_text)).add_to(acc);
+        postfix_snippet(ctx, "box", "Box::new(expr)", &format!("Box::new({})", receiver_text))
+            .add_to(acc);
     }
 }
 
diff --git a/crates/ra_ide_api/src/completion/snapshots/completion_item__postfix_completion_works_for_trivial_path_expression.snap b/crates/ra_ide_api/src/completion/snapshots/completion_item__postfix_completion_works_for_trivial_path_expression.snap
index fcb292596..c1a40b7b4 100644
--- a/crates/ra_ide_api/src/completion/snapshots/completion_item__postfix_completion_works_for_trivial_path_expression.snap
+++ b/crates/ra_ide_api/src/completion/snapshots/completion_item__postfix_completion_works_for_trivial_path_expression.snap
@@ -1,11 +1,18 @@
 ---
-created: "2019-05-23T22:23:35.118738523Z"
+created: "2019-06-23T13:01:08.775536006Z"
 creator: [email protected]
 source: crates/ra_ide_api/src/completion/completion_item.rs
 expression: kind_completions
 ---
 [
     CompletionItem {
+        label: "box",
+        source_range: [76; 76),
+        delete: [72; 76),
+        insert: "Box::new(bar)",
+        detail: "Box::new(expr)",
+    },
+    CompletionItem {
         label: "dbg",
         source_range: [76; 76),
         delete: [72; 76),