Fix support of unsigned types in binomial_distribution

include/boost/random/binomial_distribution.hpp

@@ -321,7 +321,7 @@ class binomial_distribution {
             IntType k = static_cast<IntType>(floor((2*_u.btrd.a/us + _u.btrd.b)*u + _u.btrd.c));
             if(k < 0 || k > _t) continue;
             v = v*_u.btrd.alpha/(_u.btrd.a/(us*us) + _u.btrd.b);
-            RealType km = abs(k - m);
+            RealType km = abs(static_cast<RealType>(k) - static_cast<RealType>(m));
             if(km <= 15) {
                 RealType f = 1;
                 if(m < k) {

test/Jamfile.v2

@@ -88,6 +88,7 @@ run test_comp_xoshiro128f.cpp ;
 
 run github_issue_133.cpp ;
 run github_issue_147.cpp ;
+run github_issue_150.cpp ;
 
 run niederreiter_base2_validate.cpp /boost/test//boost_unit_test_framework ;
 run sobol_validate.cpp /boost/test//boost_unit_test_framework ;

test/github_issue_150.cpp

@@ -0,0 +1,25 @@
+/*
+* Copyright Matt Borland 2025.
+ * Distributed under the Boost Software License, Version 1.0. (See
+        * accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * See http://www.boost.org for most recent version including documentation.
+ *
+ * $Id$
+ */
+
+#include <boost/random.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <random>
+#include <cstdint>
+
+int main()
+{
+    std::mt19937_64 gen;
+    boost::random::binomial_distribution<std::uint64_t> dist;
+
+    BOOST_TEST(dist(gen) >= 0);
+
+    return boost::report_errors();
+}