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any pointers to troubleshooting this error?
```failed with an unhandled exception:
    TypeError: undefined is not iterable (cannot read property Symbol(Symbol.iterator))
        at &lt;source path&gt;/node_modules/@pulumi/cluster.ts:416:13
        at &lt;source path&gt;/node_modules/@pulumi/output.ts:383:31```


the stack trace only references lines in node_modules

i get this running `pulumi up` after switching stacks to a new stack that i haven't run `pulumi up` on before

<@U02PV0365JA> it looks likr you're trying to iterate on an output, which isn't allowed. If you share your code it'll help

i have no clue where that comes from. the stack trace doesn't point to my codebase. only to node_modules

also it works as-is on one stack. then i did `pulumi stack init &lt;newstackname&gt;, set up it's config, and ran `pulumi up`. this is the error it replied with after i ran `pulumi up`

i think i narrowed it down to fetching my tf state and referencing an output that doesn't exist in the state