ess-emphasis{color:var(--bs-success-text-emphasis)!important}.text-info-emphasis{color:var(--bs-info-text-emphasis)!important}.text-warning-emphasis{color:var(--bs-warning-text-emphasis)!important}.text-danger-emphasis{color:var(--bs-danger-text-emphasis)!important}.text-light-emphasis{color:var(--bs-light-text-emphasis)!important}.text-dark-emphasis{color:var(--bs-dark-text-emphasis)!important}.link-opacity-10{--bs-link-opacity:0.1}.link-opacity-10-hover:hover{--bs-link-opacity:0.1}.link-opacit...

            elementToElementMap.put("li", "listitem");
            elementToElementMap.put("em", "emphasis");
            elementToElementMap.put("strong", "emphasis");
            elementToElementMap.put("i", "emphasis");
            elementToElementMap.put("b", "emphasis");
            elementToElementMap.put("code", "literal");
            elementToElementMap.put("tt", "literal");
        }

!important;\n}\n\n.text-secondary-emphasis {\n  color: var(--bs-secondary-text-emphasis) !important;\n}\n\n.text-success-emphasis {\n  color: var(--bs-success-text-emphasis) !important;\n}\n\n.text-info-emphasis {\n  color: var(--bs-info-text-emphasis) !important;\n}\n\n.text-warning-emphasis {\n  color: var(--bs-warning-text-emphasis) !important;\n}\n\n.text-danger-emphasis {\n  color: var(--bs-danger-text-emphasis) !important;\n}\n\n.text-light-emphasis {\n  color: var(--bs-light-text-emphasis) !important;\n}\...

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.
If code depends on buggy (including insecure) behavior,
then fixing the bug will break that code.

and put back into the jury-box, or they would die.

  `The trial cannot proceed,' said the King in a very grave
voice, `until all the jurymen are back in their proper places--
ALL,' he repeated with great emphasis, looking hard at Alice as
he said do.

  Alice looked at the jury-box, and saw that, in her haste, she
had put the Lizard in head downwards, and the poor little thing

and put back into the jury-box, or they would die.

  `The trial cannot proceed,' said the King in a very grave
voice, `until all the jurymen are back in their proper places--
ALL,' he repeated with great emphasis, looking hard at Alice as
he said do.

  Alice looked at the jury-box, and saw that, in her haste, she
had put the Lizard in head downwards, and the poor little thing

stylelint-disable declaration-no-important\n\n// Typography\n\n@mixin text-emphasis-variant($parent, $color, $ignore-warning: false) {\n  #{$parent} {\n    color: $color !important;\n  }\n  @if $emphasized-link-hover-darken-percentage != 0 {\n    a#{$parent} {\n      @include hover-focus() {\n        color: darken($color, $emphasized-link-hover-darken-percentage) !important;\n      }\n    }\n  }\n  @include deprecate(\"`text-emphasis-variant()`\", \"v4.4.0\", \"v5\", $ignore-warning);\n}\n","// CSS image...

@GwtCompatible
@SuppressWarnings("serial") // we're overriding default serialization
// TODO(kevinb): I think we should push everything down to "BaseImmutableCollection" or something,
// just to do everything we can to emphasize the "practically an interface" nature of this class.
public abstract class ImmutableCollection<E> extends AbstractCollection<E> implements Serializable {
  /*

@GwtCompatible
@SuppressWarnings("serial") // we're overriding default serialization
// TODO(kevinb): I think we should push everything down to "BaseImmutableCollection" or something,
// just to do everything we can to emphasize the "practically an interface" nature of this class.
public abstract class ImmutableCollection<E> extends AbstractCollection<E> implements Serializable {
  /*

stylelint-disable declaration-no-important\n\n// Typography\n\n@mixin text-emphasis-variant($parent, $color, $ignore-warning: false) {\n  #{$parent} {\n    color: $color !important;\n  }\n  @if $emphasized-link-hover-darken-percentage != 0 {\n    a#{$parent} {\n      @include hover-focus() {\n        color: darken($color, $emphasized-link-hover-darken-percentage) !important;\n      }\n    }\n  }\n  @include deprecate(\"`text-emphasis-variant()`\", \"v4.4.0\", \"v5\", $ignore-warning);\n}\n","// CSS image...