Attribute modified in optimizers dones't take effect

[yandai]

Hello,

I use the following code to modify attrs in my custom graph optimizer but at the time of model inference, attrs field keep unchanged. And I try to comment out graph.SetGraphProtoSyncNeeded() or graph.SetGraphResolveNeeded() but the attr is still the old value.

auto attrs = some_op->GetMutableAttributes();
attrs['my_field'].set_i(new_value);
graph.SetGraphResolveNeeded();
graph.SetGraphProtoSyncNeeded();
graph.Resolve();

Could someone give some help for this problem? Thanks

update:
I find out it's my bug
auto attrs = some_op->GetMutableAttributes();
should be
auto &attrs = some_op->GetMutableAttributes();

Best Regards