example.com/cmd contains main packages.

v1.0.0 is the latest non-retracted version. Other versions contain errors or
detectable problems.

-- .info --
{"Version":"v1.0.0"}
-- .mod --
module example.com/cmd

go 1.16
-- go.mod --
module example.com/cmd

go 1.16
-- a/a.go --
package main

import "fmt"

func main() { fmt.Println("a@v1.0.0") }
-- b/b.go --
package main

import "fmt"

			}
			summary.require = append(summary.require, module.Version{Path: "go", Version: summary.goVersion})
		}
		if len(f.Retract) > 0 {
			summary.retract = make([]retraction, 0, len(f.Retract))
			for _, ret := range f.Retract {
				summary.retract = append(summary.retract, retraction{
					VersionInterval: ret.VersionInterval,
					Rationale:       ret.Rationale,
				})
			}
		}

# There are two ways for the module author to bring the two into alignment.
# One is to *explicitly* 'exclude' the version that is already *implicitly*
# pruned out under 1.17.

go mod edit -exclude=example.com/retract/incompatible@v2.0.0+incompatible

					continue
				}
			}

			allowed := CheckAllowed
			if IsRevisionQuery(path, vers) || mode&ListRetracted != 0 {
				// Allow excluded and retracted versions if the user asked for a
				// specific revision or used 'go list -retracted'.
				allowed = nil
			}
			info, err := queryReuse(ctx, path, vers, current, allowed, reuse)
			if err != nil {
				var origin *codehost.Origin
				if info != nil {

# 'go install pkg@version' will only match a retracted version if it's
# explicitly requested.
env GO111MODULE=on
go list -m -versions example.com/cmd
! stdout v1.9.0
go list -m -versions -retracted example.com/cmd
stdout v1.9.0
go install example.com/cmd/a@latest
go version -m $GOPATH/bin/a$GOEXE

//
// Later replace directives take priority.
//
// require directives are not de-duplicated. That's left up to higher-level
// logic (MVS).
//
// retract directives are not de-duplicated since comments are
// meaningful, and versions may be retracted multiple times.
func (f *WorkFile) removeDups() {
	removeDups(f.Syntax, nil, &f.Replace)

//
// The -retracted flag causes list to report information about retracted
// module versions. When -retracted is used with -f or -json, the Retracted
// field will be set to a string explaining why the version was retracted.
// The string is taken from comments on the retract directive in the
// module's go.mod file. When -retracted is used with -versions, retracted
// versions are listed together with unretracted versions. The -retracted

	tagPrefix := ""
	if r.codeDir != "" {
		tagPrefix = r.codeDir + "/"
	}

	isRetracted, err := r.retractedVersions(ctx)
	if err != nil {
		isRetracted = func(string) bool { return false }
	}

	// tagToVersion returns the version obtained by trimming tagPrefix from tag.
	// If the tag is invalid, retracted, or a pseudo-version, tagToVersion returns
	// an empty version.

		downgraded = append(downgraded, r)
	}

	// The downgrades we computed above only downgrade to versions enumerated by
	// reqs.Previous. However, reqs.Previous omits some versions — such as
	// pseudo-versions and retracted versions — that may be selected as transitive
	// requirements of other modules.
	//
	// If one of those requirements pulls the version back up above the version

	37:  "signal 37",
	38:  "signal 38",
	39:  "signal 39",
	48:  "signal 48",
	49:  "signal 49",
	58:  "signal 58",
	59:  "CPU Failure Predicted",
	60:  "monitor mode granted",
	61:  "monitor mode retracted",
	62:  "sound completed",
	63:  "secure attention",
	255: "signal 255",