mod=example.com/retract
success=false
-- want --
# diagnostics
required module example.com/retractdep/v3@v3.0.0 retracted by module author

# summary
Inferred base version: v0.0.1
Suggested version: v0.1.0
-- go.mod --
module example.com/retract

go 1.12

require example.com/retractdep/v3 v3.0.0
-- go.sum --
example.com/retractdep/v3 v3.0.0 h1:LEaqsEpt7J4Er+qSPqL7bENpIkRdZdaOE6KaUaiNB5I=
example.com/retractdep/v3 v3.0.0/go.mod h1:B2rEwAWayv3FJ2jyeiq9O3UBbxSvdDqZUtxmKsLyg6k=
-- a.go --
package a

import _ "example.com/retractdep/v3"