Are there any supported way to abort a running stack immediately from the stack itself? Previously, I have just used exit (in Python), but after we switched to inline stacks, this does not work - the process just hangs until terminated.

See here, there’s an error log which is fatal https://www.pulumi.com/docs/intro/concepts/logging/

It just adds an error. It does not stop the current update.

yep, that’s my misunderstanding, looks like the docs aren’t accurate. I’m following up internally. Re: your issue, do you have a repro?

Hmm.. I could make one. But any inline stack that calls exit(1) seems to be in problems. I also tried with pulumi.errors.RunError() but it doesn't about the execution like exit, but first applies the new world view, which is exactly the opposite of what I want 🙂

some smart Python people just told me to tell you to try

raise Exception("I want my program to end")

Will do...