} catch( UnsupportedEncodingException uee ) {
        }
        dstIndex += scope.length();

        dst[dstIndex++] = (byte)0x00;

        // now go over scope backwards converting '.' to label length

        int i = dstIndex - 2;
        int e = i - scope.length();
        int c = 0;

        do {
            if( dst[i] == '.' ) {
                dst[i] = (byte)c;

 *  New: `OkHttpClient.Builder` now has APIs that use `kotlin.time.Duration`.

 *  New: `mockwebserver3.SocketPolicy` is now a sealed interface. This is one of several
    backwards-incompatible API changes that may impact early adopters of this alpha API.

 *  New: `mockwebserver3.Stream` for duplex streams.

 *  New: `mockwebserver3.MockResponseBody` for streamed response bodies.

 *       returned)
 * </ol>
 *
 * <p>Alas, {@link #reverse} is a little different. As you read backwards through a chain and
 * encounter a call to {@code reverse}, continue working backwards until a result is determined, and
 * then reverse that result.
 *
 * <h3>Additional notes</h3>
 *

        if (typeof options.applyClass === 'string') //backwards compat
            this.applyButtonClasses = options.applyClass;

        if (typeof options.cancelButtonClasses === 'string')
            this.cancelButtonClasses = options.cancelButtonClasses;

        if (typeof options.cancelClass === 'string') //backwards compat
            this.cancelButtonClasses = options.cancelClass;

- Dropped the additional rule requirement (cronjobs/finalizers) for roles
  using kubectl create cronjobs to ensure backward compatibility. ([#124883](https://github.com/kubernetes/kubernetes/pull/124883), [@ardaguclu](https://github.com/ardaguclu))

	tagCmd := tag.TagCommand(ctx)
	hideInheritedFlags(tag.TagCommand(ctx), cli.FlagNamespace, cli.FlagIstioNamespace, FlagCharts)
	rootCmd.AddCommand(tagCmd)

	// leave the multicluster commands in x for backwards compat
	rootCmd.AddCommand(multicluster.NewCreateRemoteSecretCommand(ctx))
	rootCmd.AddCommand(proxyconfig.ClustersCommand(ctx))

	rootCmd.AddCommand(collateral.CobraCommand(rootCmd, collateral.Metadata{

A subroute on a client must match a subroute on the server. So routes cannot be used for dynamic routing, unlike HTTP.

Handlers should remain backwards compatible. If a breaking API change is required, a new handler ID should be created.

## Setup & Configuration

A **Manager** is used to manage all incoming and outgoing connections to a server.

                : new NonTerminalImmutableMapEntry<K, V>(key, value, keyBucketHead);
        table[tableIndex] = effectiveEntry;
      } else {
        // We already saw this key, and the first value we saw (going backwards) is the one we are
        // keeping. So we won't touch table[], but we do still want to add the existing entry that
        // we found to entries[] so that we will see this key in the right place when iterating.

---
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.

* For Deployment, ReplicaSet, and DaemonSet, selectors are now immutable when updating via the new `apps/v1beta2` API. For backward compatibility, selectors can still be changed when updating via `apps/v1beta1` or `extensions/v1beta1`. ([#50719](https://github.com/kubernetes/kubernetes/pull/50719), [@crimsonfaith91](https://github.com/crimsonfaith91))