diff --git a/lldb/source/API/SBStructuredData.cpp b/lldb/source/API/SBStructuredData.cpp
--- a/lldb/source/API/SBStructuredData.cpp
+++ b/lldb/source/API/SBStructuredData.cpp
@@ -53,7 +53,13 @@
       lldb::SBStructuredData &,
       SBStructuredData, operator=,(const lldb::SBStructuredData &), rhs);
 
-  *m_impl_up = *rhs.m_impl_up;
+  if (m_impl_up && rhs.m_impl_up)
+    *m_impl_up = *rhs.m_impl_up;
+  else if (m_impl_up && !rhs.m_impl_up)
+    m_impl_up.release();
+  else if (!m_impl_up && rhs.m_impl_up)
+    m_impl_up = std::make_unique<StructuredDataImpl>(*rhs.m_impl_up);
+
   return LLDB_RECORD_RESULT(*this);
 }