/**
     * SMB command to setup a session with extended attributes.
     */
    public static final byte SMB_COM_SESSION_SETUP_ANDX = (byte) 0x73;

    /**
     * SMB command to logoff from a session with extended attributes.
     */
    public static final byte SMB_COM_LOGOFF_ANDX = (byte) 0x74;

    /**
     * SMB command to connect to a tree share with extended attributes.
     */

	// Make sure that the input format is GNU.
	// Unfortunately, the STAR format also has a sparse header format that uses
	// the same type flag but has a completely different layout.
	if blk.getFormat() != FormatGNU {
		return nil, ErrHeader
	}
	hdr.Format.mayOnlyBe(FormatGNU)

	var p parser
	hdr.Size = p.parseNumeric(blk.toGNU().realSize())
	if p.err != nil {
		return nil, p.err

		"PK\x01\x02\x14\x00\x14\x00\b\b\b\x004\x9d3?Ļ\x14\xe3\xd8\x01\x00\x00\xd8\x03\x00\x00 \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00:E\x02\x00res/layout/wallpaper_cropper.xml",

---
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.

- github.com/go-kit/log: [v0.1.0 → v0.2.0](https://github.com/go-kit/log/compare/v0.1.0...v0.2.0)
- github.com/go-logfmt/logfmt: [v0.5.0 → v0.5.1](https://github.com/go-logfmt/logfmt/compare/v0.5.0...v0.5.1)
- github.com/go-openapi/jsonreference: [v0.19.5 → v0.20.0](https://github.com/go-openapi/jsonreference/compare/v0.19.5...v0.20.0)

			<artifactId>log4j-jul</artifactId>
			<version>${log4j.version}</version>
		</dependency>
		<dependency>
			<groupId>co.elastic.logging</groupId>
			<artifactId>log4j2-ecs-layout</artifactId>
			<version>${log4j.ecs.version}</version>
		</dependency>

		<!-- opensearch -->
		<dependency>
			<groupId>org.opensearch</groupId>
			<artifactId>opensearch</artifactId>

                addViolation(
                        problems,
                        Severity.WARNING,
                        Version.V20,
                        prefix + "layout",
                        repository.getId(),
                        "uses the unsupported value 'legacy', artifact resolution might fail.",
                        repository);
            }
        }
    }

- github.com/envoyproxy/protoc-gen-validate: [v1.0.4 → v1.1.0](https://github.com/envoyproxy/protoc-gen-validate/compare/v1.0.4...v1.1.0)
- github.com/go-logfmt/logfmt: [v0.5.1 → v0.4.0](https://github.com/go-logfmt/logfmt/compare/v0.5.1...v0.4.0)
- github.com/golang-jwt/jwt/v4: [v4.5.0 → v4.5.2](https://github.com/golang-jwt/jwt/compare/v4.5.0...v4.5.2)

height:12px !important;
}

span[class="address"]{
display:block !important;
width:240px !important;
}
td[class="cut"]{
display:none !important;
}

td[class="logo"]{
width:40px !important;
}

td[class="logo"] img {
width:24px !important;
}

img[class="media"]{
width:100% !important;
}

img[class="story-media"]{
width:100% !important;
}

# Before VS 2017 15.8, the member "type" would non-conformingly have an
# alignment of only alignof(max_align_t). VS 2017 15.8 was fixed to handle this
# correctly, but the fix inherently changes layout and breaks binary
# compatibility (*only* for uses of aligned_storage with extended alignments).
common:windows --copt=-D_ENABLE_EXTENDED_ALIGNED_STORAGE
common:windows --host_copt=-D_ENABLE_EXTENDED_ALIGNED_STORAGE