</div>
    <div class="item">
      <a title="Scalar: Beautiful Open-Source API References from Swagger/OpenAPI files" style="display: block; position: relative;" href="https://github.com/scalar/scalar/?utm_source=fastapi&utm_medium=website&utm_campaign=top-banner" target="_blank">
        <span class="sponsor-badge">sponsor</span>
        <img class="sponsor-image" src="/img/sponsors/scalar-banner.svg" />
      </a>
    </div>
    <div class="item">

* <a href="https://docs.porter.run/language-specific-guides/fastapi" class="external-link" target="_blank">Porter</a>
* <a href="https://www.withcoherence.com/?utm_medium=advertising&utm_source=fastapi&utm_campaign=website" class="external-link" target="_blank">Coherence</a>

* <a href="https://docs.porter.run/language-specific-guides/fastapi" class="external-link" target="_blank">Porter</a>

    title: Automate FastAPI documentation generation with Bump.sh
    img: https://fastapi.tiangolo.com/img/sponsors/bump-sh.svg
  - url: https://github.com/scalar/scalar/?utm_source=fastapi&utm_medium=website&utm_campaign=main-badge
    title: "Scalar: Beautiful Open-Source API References from Swagger/OpenAPI files"
    img: https://fastapi.tiangolo.com/img/sponsors/scalar.svg

## Website

[fess.codelibs.org](https://fess.codelibs.org/)

## Issues/Questions

[discuss.codelibs.org](https://discuss.codelibs.org/c/FessEN/)

## Getting Started

            } else {
                sb.append(LS);
                sb.append(LS);
                sb.append(indentation);
                sb.append("Try downloading the file manually from the project website.");
            }

            sb.append(LS);
            sb.append(LS);
            sb.append(indentation);
            sb.append("Then, install it using the command: ");
            sb.append(LS);

## Website

[fess.codelibs.org](https://fess.codelibs.org/)

## Probleme/Fragen

[discuss.codelibs.org](https://discuss.codelibs.org/c/FessEN/)

## Erste Schritte

general, be batched to be fixed at the same time as a quarterly release. We
credit reporters for identifying security issues, although we keep your name
confidential if you request it. Please see Google Bug Hunters program website

<a href="https://github.com/scalar/scalar/?utm_source=fastapi&utm_medium=website&utm_campaign=main-badge" target="_blank" title="Scalar: Beautiful Open-Source API References from Swagger/OpenAPI files"><img src="https://fastapi.tiangolo.com/img/sponsors/scalar.svg"></a>

---
title: "Go, Backwards Compatibility, and GODEBUG"
layout: article
---

<!--
This document is kept in the Go repo, not x/website,
because it documents the full list of known GODEBUG settings,
which are tied to a specific release.
-->

## Introduction {#intro}

Go's emphasis on backwards compatibility is one of its key strengths.
There are, however, times when we cannot maintain complete compatibility.