A small bug related to creation of evaluation domains of size 1.

NilFoundation · Dec 11, 2024 · 99ff3a6 · 99ff3a6
1 parent d0a06c5
commit 99ff3a6
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/crypto3/libs/math/include/nil/crypto3/math/algorithms/make_evaluation_domain.hpp b/crypto3/libs/math/include/nil/crypto3/math/algorithms/make_evaluation_domain.hpp
@@ -107,6 +107,12 @@ namespace nil {
 
                 typedef std::shared_ptr<evaluation_domain<FieldType, ValueType>> result_type;
 
+				// If m is 1, the value of (std::size_t(std::ceil(std::log2(m))) - 1) is -1, and stored in size_t it becomes a
+				// very large value.
+				if (m == 1) {
+					return result_type();
+				}
+
                 const std::size_t big = 1ul << (std::size_t(std::ceil(std::log2(m))) - 1);
                 const std::size_t rounded_small = (1ul << std::size_t(std::ceil(std::log2(m - big))));