fix

Author: marty

routers/web/repo/pull.go

@@ -527,6 +527,10 @@ func PrepareViewPullInfo(ctx *context.Context, issue *models.Issue) *git.Compare
 		return nil
 	}
 
+	if compareInfo.HeadCommitID == compareInfo.MergeBase {
+		ctx.Data["IsNothingToCompare"] = true
+	}
+
 	ctx.Data["PullRequestWorkInProgressPrefixes"] = setting.Repository.PullRequest.WorkInProgressPrefixes
 
 	if pull.IsWorkInProgress() {

templates/repo/commits_table.tmpl

@@ -2,6 +2,9 @@
 	<div class="commits-table-left df ac">
 		{{if or .PageIsCommits (gt .CommitCount 0)}}
 			{{.CommitCount}} {{.i18n.Tr "repo.commits.commits"}} {{if .Branch}}({{.Branch}}){{end}}
+		{{else if .IsNothingToCompare }}
+			{{.i18n.Tr "repo.pulls.is_empty" $.BaseBranch $.HeadBranch }} {{if .Branch}}({{.Branch}}){{end}}
+
 		{{else}}
 			{{.i18n.Tr "repo.commits.no_commits" $.BaseBranch $.HeadBranch }} {{if .Branch}}({{.Branch}}){{end}}
 		{{end}}