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Possibly an issue with `@grpc/grpc-js` v1.8.15 published 6 days ago

I've rolled back both `@pulumi/pulumi` and `@grpc/grpc-js` and still experiencing this issue

I believe perhaps its the latest version of the CLI. It may be running plugins in a way that makes the plugin / its dependencies believe it should print color output?

Possibly this PR? it's the only one I could find that makes changes to the files implementing `RunPlugin`

<https://github.com/pulumi/pulumi/pull/11224>

Strange, we run tests against those grpc end points in CI. Plus those new endpoints are used by pulumi-resource-pulumi-nodejs (which is the plugin for node dynamic providers), I suspect your right that it might be due to changes in grpc-js. Can you raise an issue on github for us to look into this.

Thanks Fraser, I've raised <https://github.com/pulumi/pulumi/issues/13150>