...

src/compiler.cpp

@@ -1202,7 +1202,6 @@ __EAT_DOTS_END:
         PyObject* e_obj = vm->call(vm->builtins->attr(type), VAR(msg));
         Exception& e = PK_OBJ_GET(Exception, e_obj);
         e.st_push(src, lineno, cursor, "");
-        e._self = e_obj;
         throw e;
     }
 }   // namespace pkpy

src/pocketpy.cpp

@@ -1301,6 +1301,7 @@ void init_builtins(VM* _vm) {
         StrName cls_name = obj_type_name(vm, cls);
         PyObject* e_obj = vm->heap.gcnew<Exception>(cls, cls_name);
         e_obj->_enable_instance_dict();
+        PK_OBJ_GET(Exception, e_obj)._self = e_obj;
         return e_obj;
     });
 

src/pocketpy_c.cpp

@@ -50,7 +50,6 @@ static PyObject* stack_item(VM* vm, int index){
     } catch(const std::exception& re){ \
         PyObject* e_t = vm->_t(vm->tp_exception); \
         vm->_c.error = vm->call(e_t, VAR(re.what())); \
-        PK_OBJ_GET(Exception, vm->_c.error)._self = vm->_c.error; \
         return false; \
     }
 
@@ -505,7 +504,6 @@ bool pkpy_error(pkpy_vm* vm_handle, const char* name, pkpy_CString message) {
         }
     }
     vm->_c.error = vm->call(e_t, VAR(std::string_view(message.data, message.size)));
-    PK_OBJ_GET(Exception, vm->_c.error)._self = vm->_c.error;
     return false;
 }
 

src/vm.cpp

@@ -1176,7 +1176,6 @@ void VM::_builtin_error(StrName type, const Str& msg){ _builtin_error(type, VAR(
 void VM::_error(PyObject* e_obj){
     PK_ASSERT(isinstance(e_obj, tp_exception))
     Exception& e = PK_OBJ_GET(Exception, e_obj);
-    e._self = e_obj;
     if(callstack.empty()){
         e.is_re = false;
         throw e;