@echoing-dinner-19531 I got a deep Python related error. Here is my preview run failing: github.com/hardes-bv/iac-homelab-dns/…/90635136477 Erratic line in the source code: github.com/hardes-bv/iac-homelab-dns/blob/…/__main__.py#… The typing of that property in the generated SDK: github.com/pulumiverse/pulumi-scaleway/blob/…/_inputs.py#… I let NEO investigate and somewhere in its thinking, it came up with this:

Root Cause:

PolicyRuleArgs.project_ids

is annotated as

pulumi.Input[Optional[Sequence[pulumi.Input[str]]]]

. At runtime, this expands to a 4-argument

Union[Sequence[...], None, Awaitable[...], Output[None]]

. The Pulumi SDK's

_get_list_element_type()

function only handles 3-arg Input Unions — it doesn't unwrap the 4-arg

Optional[Input[...]]

pattern — so it throws

Unexpected type. Expected 'list' got 'typing.Union[...]'

.

Can you confirm?

yeh looks similar, I'll see if we can repro in a conf test and fix