Is panic!() the same as trap()?

[senior.joinu]

Couldn’t find the answer. There is no such panic hook in ic-cdk-rs either.

Will panic revert the state? Is it correct to use Result::expect and other helpers which panic?

[paulyoung]

Did you ever get an answer on this?

[paulyoung]

Some conflicting info here.

@ccyanxyz

ic_cdk::trap can explicitly propagate the error message to the client, and the state changes before trap are reverted.

@chenyan

You can trap by calling by ic_cdk::api::trap(&str), but the state won’t rollback.

[chenyan]

I mean the state before the last async call won’t be rolled back. State changes from the last async till trap is reverted.