mod=example.com/retract
success=false
-- want --
# diagnostics
required module example.com/retractdep/v2@v2.0.0 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/v2 v2.0.0
-- go.sum --
example.com/retractdep/v2 v2.0.0 h1:ehV4yfX3A3jNlRnBmHPxq1TyVs1EhmCYI5miEva6Gv8=
example.com/retractdep/v2 v2.0.0/go.mod h1:rV+p/Yqwnupg15GPVGFRq+un/MYczBZcF1IZ8ubecag=
-- a.go --
package a

import _ "example.com/retractdep/v2"