fix CI lib build with beta compiler

diff --git a/src/indexing.rs b/src/indexing.rs
index be6d726045c05a092d4dfa459da4c64aa638a74e..286f618acc76de8e50e3c21082aeb2f6e928a17d 100644 (file)
--- a/src/indexing.rs
+++ b/src/indexing.rs
@@ -28,6 +28,7 @@ pub(crate) enum IndexingCodePtr {
 enum OptArgIndexKeyType {
     Structure,
     Constant,
+    #[allow(dead_code)]
     List,
 }