diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
index 07ff2e97aac7..8a39e720eaba 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
@@ -2116,7 +2116,8 @@ void ClangExpressionDeclMap::AddOneFunction(NameSearchContext &context,
   parser_vars->m_llvm_value = NULL;
 
   if (log) {
-    ASTDumper ast_dumper(function_decl);
+    std::string function_str =
+        function_decl ? ASTDumper(function_decl).GetCString() : "nullptr";
 
     StreamString ss;
 
@@ -2127,7 +2128,7 @@ void ClangExpressionDeclMap::AddOneFunction(NameSearchContext &context,
     log->Printf(
         "  CEDM::FEVD[%u] Found %s function %s (description %s), returned %s",
         current_id, (function ? "specific" : "generic"), decl_name.c_str(),
-        ss.GetData(), ast_dumper.GetCString());
+        ss.GetData(), function_str.c_str());
   }
 }