Initialize the Python script interpreter lazily (i.e. not at debugger startup)

This time it should also pass the gtests

llvm-svn: 266103

lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp

@@ -274,7 +274,7 @@ ScriptInterpreterPython::ScriptInterpreterPython(CommandInterpreter &interpreter
     m_lock_count(0),
     m_command_thread_state(nullptr)
 {
-    assert(g_initialized && "ScriptInterpreterPython created but InitializePrivate has not been called!");
+    InitializePrivate();
 
     m_dictionary_name.append("_dict");
     StreamString run_string;
@@ -330,8 +330,6 @@ ScriptInterpreterPython::Initialize()
 
     std::call_once(g_once_flag, []()
     {
-        InitializePrivate();
-
         PluginManager::RegisterPlugin(GetPluginNameStatic(),
                                       GetPluginDescriptionStatic(),
                                       lldb::eScriptLanguagePython,
@@ -3097,7 +3095,9 @@ ScriptInterpreterPython::InitializeInterpreter (SWIGInitCallback swig_init_callb
 void
 ScriptInterpreterPython::InitializePrivate ()
 {
-    assert(!g_initialized && "ScriptInterpreterPython::InitializePrivate() called more than once!");
+    if (g_initialized)
+        return;
+
     g_initialized = true;
 
     Timer scoped_timer (__PRETTY_FUNCTION__, __PRETTY_FUNCTION__);