1 files changed, 1 insertions, 0 deletions

diff --git a/crates/ra_hir/src/ids.rs b/crates/ra_hir/src/ids.rs
index 2bd617436..a144e4a1e 100644
--- a/crates/ra_hir/src/ids.rs
+++ b/crates/ra_hir/src/ids.rs
@@ -373,6 +373,7 @@ impl SourceFileItems {
 impl std::ops::Index<SourceFileItemId> for SourceFileItems {
     type Output = SyntaxNodePtr;
     fn index(&self, idx: SourceFileItemId) -> &SyntaxNodePtr {
+        eprintln!("invalid SourceFileItemId({:?}) for file({:?})", idx, self.file_id);
         &self.arena[idx]
     }
 }