mod=example.com/basic
base=v0.0.1
release=v0.1.0
success=false
# The contents below are a copy of the v0.0.1 contents - nothing has changed.
# But v0.1.0 already exists, so it should present a diagnostic.
-- want --
# summary
v0.1.0 is not a valid semantic version for this release.
version v0.1.0 already exists
-- go.mod --
module example.com/basic

go 1.12
-- a/a.go --
package a

func A() int { return 0 }