diff --git a/lldb/bindings/python/python-swigsafecast.swig b/lldb/bindings/python/python-swigsafecast.swig
--- a/lldb/bindings/python/python-swigsafecast.swig
+++ b/lldb/bindings/python/python-swigsafecast.swig
@@ -1,19 +1,32 @@
 namespace lldb_private {
 namespace python {
 
-PyObject *SBTypeToSWIGWrapper(lldb::SBEvent &event_sb) {
-  return SWIG_NewPointerObj(&event_sb, SWIGTYPE_p_lldb__SBEvent, 0);
-}
-
-PyObject *SBTypeToSWIGWrapper(lldb::SBCommandReturnObject &cmd_ret_obj_sb) {
-  return SWIG_NewPointerObj(&cmd_ret_obj_sb,
-                            SWIGTYPE_p_lldb__SBCommandReturnObject, 0);
-}
-
 PythonObject ToSWIGHelper(void *obj, swig_type_info *info) {
   return {PyRefType::Owned, SWIG_NewPointerObj(obj, info, SWIG_POINTER_OWN)};
 }
 
+/// A class that automatically clears an SB object when it goes out of scope.
+/// Use for cases where the SB object points to a temporary/unowned entity.
+template <typename T> class ScopedPythonObject : PythonObject {
+public:
+  ScopedPythonObject(T *sb, swig_type_info *info)
+      : PythonObject(ToSWIGHelper(sb, info)), m_sb(sb) {}
+  ~ScopedPythonObject() {
+    if (m_sb)
+      *m_sb = T();
+  }
+  ScopedPythonObject(ScopedPythonObject &&rhs)
+      : PythonObject(std::move(rhs)), m_sb(std::exchange(rhs.m_sb, nullptr)) {}
+  ScopedPythonObject(const ScopedPythonObject &) = delete;
+  ScopedPythonObject &operator=(const ScopedPythonObject &) = delete;
+  ScopedPythonObject &operator=(ScopedPythonObject &&) = delete;
+
+  const PythonObject &obj() const { return *this; }
+
+private:
+  T *m_sb;
+};
+
 PythonObject ToSWIGWrapper(std::unique_ptr<lldb::SBValue> value_sb) {
   return ToSWIGHelper(value_sb.release(), SWIGTYPE_p_lldb__SBValue);
 }
@@ -94,5 +107,17 @@
                       SWIGTYPE_p_lldb__SBSymbolContext);
 }
 
+ScopedPythonObject<lldb::SBCommandReturnObject>
+ToSWIGWrapper(CommandReturnObject &cmd_retobj) {
+  return ScopedPythonObject<lldb::SBCommandReturnObject>(
+      new lldb::SBCommandReturnObject(cmd_retobj),
+      SWIGTYPE_p_lldb__SBCommandReturnObject);
+}
+
+ScopedPythonObject<lldb::SBEvent> ToSWIGWrapper(Event *event) {
+  return ScopedPythonObject<lldb::SBEvent>(new lldb::SBEvent(event),
+                                           SWIGTYPE_p_lldb__SBEvent);
+}
+
 } // namespace python
 } // namespace lldb_private
diff --git a/lldb/bindings/python/python-wrapper.swig b/lldb/bindings/python/python-wrapper.swig
--- a/lldb/bindings/python/python-wrapper.swig
+++ b/lldb/bindings/python/python-wrapper.swig
@@ -376,9 +376,8 @@
 
   PythonObject result;
   if (event != nullptr) {
-    lldb::SBEvent sb_event(event);
-    PythonObject event_arg(PyRefType::Owned, SBTypeToSWIGWrapper(sb_event));
-    result = pfunc(event_arg);
+    ScopedPythonObject<SBEvent> event_arg = ToSWIGWrapper(event);
+    result = pfunc(event_arg.obj());
   } else
     result = pfunc();
 
@@ -795,7 +794,6 @@
     lldb::DebuggerSP debugger, const char *args,
     lldb_private::CommandReturnObject &cmd_retobj,
     lldb::ExecutionContextRefSP exe_ctx_ref_sp) {
-  lldb::SBCommandReturnObject cmd_retobj_sb(cmd_retobj);
 
   PyErr_Cleaner py_err_cleaner(true);
   auto dict = PythonModule::MainModule().ResolveName<PythonDictionary>(
@@ -812,14 +810,13 @@
     return false;
   }
   PythonObject debugger_arg = ToSWIGWrapper(std::move(debugger));
-  PythonObject cmd_retobj_arg(PyRefType::Owned,
-                              SBTypeToSWIGWrapper(cmd_retobj_sb));
+  auto cmd_retobj_arg = ToSWIGWrapper(cmd_retobj);
 
   if (argc.get().max_positional_args < 5u)
-    pfunc(debugger_arg, PythonString(args), cmd_retobj_arg, dict);
+    pfunc(debugger_arg, PythonString(args), cmd_retobj_arg.obj(), dict);
   else
     pfunc(debugger_arg, PythonString(args),
-          ToSWIGWrapper(std::move(exe_ctx_ref_sp)), cmd_retobj_arg, dict);
+          ToSWIGWrapper(std::move(exe_ctx_ref_sp)), cmd_retobj_arg.obj(), dict);
 
   return true;
 }
@@ -828,7 +825,6 @@
     PyObject *implementor, lldb::DebuggerSP debugger, const char *args,
     lldb_private::CommandReturnObject &cmd_retobj,
     lldb::ExecutionContextRefSP exe_ctx_ref_sp) {
-  lldb::SBCommandReturnObject cmd_retobj_sb(cmd_retobj);
 
   PyErr_Cleaner py_err_cleaner(true);
 
@@ -838,11 +834,10 @@
   if (!pfunc.IsAllocated())
     return false;
 
-  PythonObject cmd_retobj_arg(PyRefType::Owned,
-                              SBTypeToSWIGWrapper(cmd_retobj_sb));
+  auto cmd_retobj_arg = ToSWIGWrapper(cmd_retobj);
 
   pfunc(ToSWIGWrapper(std::move(debugger)), PythonString(args),
-        ToSWIGWrapper(exe_ctx_ref_sp), cmd_retobj_arg);
+        ToSWIGWrapper(exe_ctx_ref_sp), cmd_retobj_arg.obj());
 
   return true;
 }
diff --git a/lldb/test/API/commands/command/script/TestCommandScript.py b/lldb/test/API/commands/command/script/TestCommandScript.py
--- a/lldb/test/API/commands/command/script/TestCommandScript.py
+++ b/lldb/test/API/commands/command/script/TestCommandScript.py
@@ -167,7 +167,17 @@
         self.runCmd('bug11569', check=False)
 
     def test_persistence(self):
+        """
+        Ensure that function arguments meaningfully persist (and do not crash!)
+        even after the function terminates.
+        """
         self.runCmd("command script import persistence.py")
         self.runCmd("command script add -f persistence.save_debugger save_debugger")
         self.expect("save_debugger", substrs=[str(self.dbg)])
+
+        # After the command completes, the debugger object should still be
+        # valid.
         self.expect("script str(persistence.debugger_copy)", substrs=[str(self.dbg)])
+        # The result object will be replaced by an empty result object (in the
+        # "Started" state).
+        self.expect("script str(persistence.result_copy)", substrs=["Started"])
diff --git a/lldb/test/API/commands/command/script/persistence.py b/lldb/test/API/commands/command/script/persistence.py
--- a/lldb/test/API/commands/command/script/persistence.py
+++ b/lldb/test/API/commands/command/script/persistence.py
@@ -1,9 +1,11 @@
 import lldb
 
 debugger_copy = None
+result_copy = None
 
 def save_debugger(debugger, command, context, result, internal_dict):
-    global debugger_copy
+    global debugger_copy, result_copy
     debugger_copy = debugger
+    result_copy = result
     result.AppendMessage(str(debugger))
     result.SetStatus(lldb.eReturnStatusSuccessFinishResult)