• Subsystem: stream

When we call the callback of transform implementation multiple times like the below:

const { Transform } = require('stream');
const t = new Transform({ transform (chunk, enc, cb) { cb(); cb(); } });
t.write('aa');

It emits the error event with the message Error: no writecb in Transform class.
The message talks about the internal implementation writecb and doesn't make much sense to the users.

I think it's more informative to give the message like Inappropriate multiple calls of callback of transform implementation.

I saw many gulp users see and are confused by the above error message. 1 2 3 etc