In playground: variable use before declaration causes crash

[aldendaniels]

TypeScript Version: 3.0.1

The following code snippet:

const x = y;
const y = 1;

Crashes the playground with the error:

workerMain.js:8 Uncaught Error: Converting circular structure to JSON

TypeError: Converting circular structure to JSON
    at JSON.stringify (<anonymous>)
    at e._send (workerMain.js:10)
    at workerMain.js:10
    at n.Class.define.cancel.then (workerMain.js:9)
    at e._handleMessage (workerMain.js:10)
    at e.handleMessage (workerMain.js:10)
    at t.onmessage (workerMain.js:10)
    at self.onmessage (workerMain.js:11)
    at JSON.stringify (<anonymous>)
    at e._send (workerMain.js:10)
    at workerMain.js:10
    at n.Class.define.cancel.then (workerMain.js:9)
    at e._handleMessage (workerMain.js:10)
    at e.handleMessage (workerMain.js:10)
    at t.onmessage (workerMain.js:10)
    at self.onmessage (workerMain.js:11)
    at workerMain.js:8

See this example

[mattmccutchen]

Probably a duplicate of #26068.

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.