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next.js/errors/circular-structure.md
Tim Neutkens b3045cc7a9
Implement circular JSON err.sh link (#6149)
* Implement circular JSON err.sh link

* Add test for getInitialProps returning circular json

* Make test warn less

* Fix tests

* Add reference to original tests
2019-01-27 16:12:17 +01:00

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# Circular structure in "getInitialProps" result
#### Why This Error Occurred
`getInitialProps` is serialized to JSON using `JSON.stringify` and sent to the client side for hydrating the page.
However, the result returned from `getInitialProps` can't be serialized when it has a circular structure.
#### Possible Ways to Fix It
Circular structures are not supported, so the way to fix this error is removing the circular structure from the object that is returned from `getInitialProps`.