Standalone blueprint index route not working with prefix

**Sails version**: 1.0.2
**Node version**: 8.9.0
**NPM version**: 5.5.1
**DB adapter name**: N/A
**DB adapter version**: N/A
**Operating system**: Linux

I'm attempting to create blueprint routes. I have the following in config/blueprints.js:

```
actions: true,
prefix: '/api/v1',
```

Then I have the following at api/controllers/test/index.ts:

```
declare var sails: any;

export = {
friendlyName: 'Index',
description: 'Index test.',
inputs: {
},
exits: {
},
fn: async function (inputs, exits) {
return exits.success()
}
}
```

If I hit http://localhost:1337/test, I get an OK response. If I hit http://localhost:1337/api/v1/test I get a not found response. If I hit http://localhost:1337/api/v1/test/index, I again get OK. Not sure why test/index is even mounted at /test given I've specified a prefix, or why it's mounted incorrectly under the prefix.

I converted the TypeScript action to JS, same result. I also disabled my custom middlewares in case that was my issue, which it wasn't.

Thanks for any help.

Reproduce the routes using config/blueprints.js and the standalone action in api/controllers/test/index.ts. Start by tracing how the blueprint prefix is applied to standalone index actions, then verify the expected /api/v1/test and /api/v1/test/index behavior against the unprefixed route. Done means the prefixed index route works consistently and the unintended /test route no longer appears.

Written by the indexing model from the issue text.