Module example.com/retract/self/prev is a module that retracts its own
latest version.

No unretracted versions are available.

-- .mod --
module example.com/retract/self/all

go 1.15

retract v1.9.0 // bad

-- .info --

# Verifies #42601.

go mod init m

# Request a +incompatible version retracted in v1.0.0.
go get example.com/retract/incompatible@v2.0.0+incompatible
stderr '^go: warning: example.com/retract/incompatible@v2.0.0\+incompatible: retracted by module author$'

# We should still see a warning if the +incompatible was previously in the
# build list.
go get example.com/retract/incompatible@v2.0.0+incompatible

Module example.com/retract/rename is renamed in this version.

This happens frequently when a repository is renamed or when a go.mod file
is added for the first time with a custom module path.
-- .info --
{"Version":"v1.9.0-new"}
-- .mod --
module example.com/retract/newname

go 1.16

// bad
retract v1.0.0-bad
-- go.mod --
module example.com/retract/newname

go 1.16

// bad
retract v1.0.0-bad
-- newname.go --

cmpenv go.mod $WORK/go.mod.edit1
go mod edit -droprequire=x.1 -dropexclude=x.1@v1.2.1 -dropexclude=x.1@v2.0.0+incompatible -dropreplace=x.1@v1.3.0 -require=x.3@v1.99.0 -dropretract=v1.0.0 -dropretract=[v1.1.0,v1.2.0]
cmpenv go.mod $WORK/go.mod.edit2

# -exclude and -retract reject invalid versions.

-- .mod --
module example.com/retract

go 1.15

-- .info --
{"Version":"v1.0.0-bad"}

-- retract.go --

-- .mod --
module example.com/retract

go 1.15

-- .info --
{"Version":"v1.0.0-good"}

-- retract.go --

-- .mod --
module example.com/retract

go 1.15

-- .info --
{"Version":"v1.0.0-unused"}

-- retract.go --

-- lazy/go.mod --
// Module lazy requires example.com/retract/incompatible v1.0.0.
//
// When viewed from the outside it also has a transitive dependency
// on v2.0.0+incompatible, but in lazy mode that transitive dependency
// is pruned out.
module example.net/lazy

go 1.17

exclude example.com/retract/incompatible v2.0.0+incompatible

require (
	example.com/retract/incompatible v1.0.0

-- .mod --
module example.com/retract/ambiguous/other

go 1.16

require example.com/retract/ambiguous v1.0.0
-- .info --
{"Version":"v1.0.0"}
-- other.go --
package other

The v1.0.0 release of example.com/retract/incompatible retracts
v2.0.0+incompatible.

-- .mod --
module example.com/retract/incompatible
-- .info --
{"Version":"v2.0.0+incompatible"}
-- incompatible.go --