diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
index e115057db8c9..12cadff93519 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
@@ -753,6 +753,8 @@ static void ReadThreadBytesReceived(void *baton, const void *src,
 bool ScriptInterpreterPython::ExecuteOneLine(
     llvm::StringRef command, CommandReturnObject *result,
     const ExecuteScriptOptions &options) {
+  std::string command_str = command.str();
+
   if (!m_valid_session)
     return false;
 
@@ -855,7 +857,7 @@ bool ScriptInterpreterPython::ExecuteOneLine(
           if (PyCallable_Check(m_run_one_line_function.get())) {
             PythonObject pargs(
                 PyRefType::Owned,
-                Py_BuildValue("(Os)", session_dict.get(), command));
+                Py_BuildValue("(Os)", session_dict.get(), command_str.c_str()));
             if (pargs.IsValid()) {
               PythonObject return_value(
                   PyRefType::Owned,
@@ -895,7 +897,6 @@ bool ScriptInterpreterPython::ExecuteOneLine(
 
     // The one-liner failed.  Append the error message.
     if (result) {
-      std::string command_str = command.str();
       result->AppendErrorWithFormat(
           "python failed attempting to evaluate '%s'\n", command_str.c_str());
     }