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-rw-r--r--utils/fast_sparse_vector.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/utils/fast_sparse_vector.h b/utils/fast_sparse_vector.h
index 9fe00459..590a60c4 100644
--- a/utils/fast_sparse_vector.h
+++ b/utils/fast_sparse_vector.h
@@ -522,7 +522,7 @@ const FastSparseVector<T> operator-(const FastSparseVector<T>& x, const FastSpar
}
template <class T>
-std::size_t hash_value(FastSparseVector<T> const& x) {
+std::size_t hash_value(FastSparseVector<T> const&) {
assert(!"not implemented");
return 0;
}