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-rw-r--r--gcc/rust/util/rust-hir-map.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/rust/util/rust-hir-map.h b/gcc/rust/util/rust-hir-map.h
index 9415ac1..17ee0fd 100644
--- a/gcc/rust/util/rust-hir-map.h
+++ b/gcc/rust/util/rust-hir-map.h
@@ -130,7 +130,7 @@ public:
HIR::ExternalItem *lookup_hir_extern_item (HirId id, HirId *parent_block);
void insert_hir_impl_block (HIR::ImplBlock *item);
- HIR::ImplBlock *lookup_hir_impl_block (HirId id);
+ tl::optional<HIR::ImplBlock *> lookup_hir_impl_block (HirId id);
bool lookup_impl_block_type (HirId id, HIR::ImplBlock **impl_block);
void insert_module (HIR::Module *module);