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-rw-r--r--absl/types/optional.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/absl/types/optional.h b/absl/types/optional.h
index 7677fe52..fd185f35 100644
--- a/absl/types/optional.h
+++ b/absl/types/optional.h
@@ -467,6 +467,7 @@ struct optional_hash_base<T, decltype(std::hash<absl::remove_const_t<T> >()(
using argument_type = absl::optional<T>;
using result_type = size_t;
size_t operator()(const absl::optional<T>& opt) const {
+ absl::type_traits_internal::AssertHashEnabled<absl::remove_const_t<T>>();
if (opt) {
return std::hash<absl::remove_const_t<T> >()(*opt);
} else {