Re: [whatwg/streams] Remove _errored and _storedError from TransformStream (#800)

ricea commented on this pull request.



> @@ -277,7 +240,11 @@ class TransformStreamDefaultController {
       throw defaultControllerBrandCheckException('error');
     }
 
-    TransformStreamError(this._controlledTransformStream, reason);
+    if (this._controlledTransformStream._readable._state !== 'readable') {
+      throw new TypeError('TransformStream is not in a state that can be errored');
+    }
+
+    TransformStreamDefaultControllerError(this, reason);

I was thinking it might be useful as a hook for other standards, but since they are more likely to just throw from transform(), maybe not?

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