diff --git a/src/nlsat/nlsat_solver.cpp b/src/nlsat/nlsat_solver.cpp
index 6a656b46d..b68e642bc 100644
--- a/src/nlsat/nlsat_solver.cpp
+++ b/src/nlsat/nlsat_solver.cpp
@@ -347,6 +347,10 @@ namespace nlsat {
             undo_until_size(0);
             del_clauses();
             del_unref_atoms();
+            m_cache.reset();
+            m_assignment.reset();
+            m_lo.reset();
+            m_hi.reset();
         }
 
         void checkpoint() {
diff --git a/src/util/scoped_numeral_vector.h b/src/util/scoped_numeral_vector.h
index b5cfb69cb..44e625550 100644
--- a/src/util/scoped_numeral_vector.h
+++ b/src/util/scoped_numeral_vector.h
@@ -28,7 +28,7 @@ public:
 
     _scoped_numeral_vector(const _scoped_numeral_vector & other) : m_manager(other.m_manager) {
         for (unsigned i = 0, e = other.size(); i != e; ++i) {
-            push_back((*this)[i]);
+            push_back(other[i]);
         }
     }