Granular unstable feature flags appear ignored

[jcayzac]

Version: Deno 1.38.3

I added this entry to my deno.jsonc:

"unstable": [
  "broadcast-channel",
  "ffi",
  "fs",
  "kv",
  "net",
  "http",
  "worker-options",
  "cron"
],

…and stopped passing --unstable to the CLI, but now I'm getting errors:

error: ReferenceError: BroadcastChannel is not defined

The schema only has:

"unstable": {
  "type": "array",
  "description": "List of unstable features to enable.",
  "items": {
    "type": "string"
  }
}

The feature name broadcast-channel is correct according to the crate's source code, and from what I understand of the feature_checker code it should work.

Moreover, passing --unstable-broadcast-channel on the command line results in the exact same error.

Granular unstable feature flags appear ignored, either on the command line or in the configuration file.

[bartlomieju]

The problem is here: https://github.com/denoland/deno/blob/0f990d9d927a0b25bc0eac32f2e7eee7c0460693/runtime/js/99_main.js#L497-L499

BroadcastChannel and WebSocketStream are only made available in the global scope if --unstable flag is passed, but ignored for granular flags.