Staking Proxy can't register account as validator

[nicolasochem]

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Description of bug

Controller accounts are being deprecated. I want to use a proxy account to declare intent to validate, just like I would previously have used a separate controller.

I have a bonded account not currently registered as validator.

When using the staking/validate extrinsic by proxy, I get a "NotController" error.

Previously, this action was allowed when the controller was separate from the stash. Therefore, it should also be allowed here.

I have verified that the account has the proxy set as "Staking Proxy".

Steps to reproduce

On kusama, run the 'staking/validate' extrincic for an account with the staking proxy. It fails with "Error: NotController"

[nicolasochem]

my bad. actually, I had to set the existing controller back to the stash and then it started working.