diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -220,8 +220,9 @@
 
 lldb_private::formatters::LibCxxMapIteratorSyntheticFrontEnd::
     LibCxxMapIteratorSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
-    : SyntheticChildrenFrontEnd(*valobj_sp), m_pair_ptr(), m_pair_sp() {
+    : m_pair_ptr(), m_pair_sp() {
   if (valobj_sp)
+    SyntheticChildrenFrontEnd(*valobj_sp);
     Update();
 }