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-rw-r--r--compiler/rustc_data_structures/src/graph/dominators/mod.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/graph/dominators/mod.rs b/compiler/rustc_data_structures/src/graph/dominators/mod.rs
index 5dd414cfd..4b819e1cb 100644
--- a/compiler/rustc_data_structures/src/graph/dominators/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/dominators/mod.rs
@@ -23,6 +23,7 @@ struct PreOrderFrame<Iter> {
}
rustc_index::newtype_index! {
+ #[orderable]
struct PreorderIndex {}
}