Conflict reason does not match the result of the "git merge" command.

[laujinkai]

I am trying to use git2go to write an utility to do automatic merge, in the process of development I encountered a strange phenomenon and do not know how to solve it.

One of my projects will get different conflict reasons than "git merge --no-ff ..." if I merge it with git2go.

The output of "git status" after running "git merge --no-ff ..." shows some unmerged files are "both added", but those same files
are shown as "modified" and merged if I run "git status" after merging branch using git2go.

Below is the code snippet I used to do the merge:

func Merge(projectPath, target, message  string) (MergeStatus, error) {
	repo, err := git.OpenRepository(projectPath)
	if err != nil {
		panic(err)
	}
	defer repo.Free()

	commit, err := resolveRefish(repo, target)
	if err != nil {
		panic(err)
	}
	defer commit.Free()

	analysis, _, err := repo.MergeAnalysis([]*git.AnnotatedCommit{commit})
	if err != nil {
		panic(err)
	}

	switch analysis {
	case git.MergeAnalysisNormal, git.MergeAnalysisFastForward:
		break // can merge

	case git.MergeAnalysisUpToDate:
		return AlreadyUpToDate, nil

	case git.MergeAnalysisNone:
		return NothingToMerge, nil

	default:
		panic(fmt.Sprintf("unhandled analysis: %v", analysis))
	}

	mergeOpts := git.MergeOptions{
		TreeFlags: git.MergeTreeFindRenames,
	}
	checkoutOpts := git.CheckoutOptions{
		Strategy: git.CheckoutForce,
	}
	err = repo.Merge([]*git.AnnotatedCommit{commit}, &mergeOpts, &checkoutOpts)
	if err != nil {
		panic(err)
	}

	index, err := repo.Index()
	if err != nil {
		panic(err)
	}
	defer index.Free()

	if index.HasConflicts() {
		return Conflicted, nil
	}

	createMergeCommit(repo, target, message)

	return Merged, nil
}

Is there something wrong with my code that causes this phenomenon?