1 files changed, 3 insertions, 2 deletions

diff --git a/crates/ra_hir_expand/src/diagnostics.rs b/crates/ra_hir_expand/src/diagnostics.rs
index 84ba97b14..e889f070f 100644
--- a/crates/ra_hir_expand/src/diagnostics.rs
+++ b/crates/ra_hir_expand/src/diagnostics.rs
@@ -36,8 +36,9 @@ pub trait AstDiagnostic {
 
 impl dyn Diagnostic {
     pub fn syntax_node(&self, db: &impl AstDatabase) -> SyntaxNode {
-        let node = db.parse_or_expand(self.source().file_id).unwrap();
-        self.source().value.to_node(&node)
+        let source = self.source();
+        let node = db.parse_or_expand(source.file_id).unwrap();
+        source.value.to_node(&node)
     }
 
     pub fn downcast_ref<D: Diagnostic>(&self) -> Option<&D> {