From ff1b00002a17f20219d79eece6b719f893c5f4c4 Mon Sep 17 00:00:00 2001
From: M4RKUS-11111 <73301416+M4RKUS-11111@users.noreply.github.com>
Date: Mon, 26 Oct 2020 10:05:27 +0100
Subject: [PATCH] Deny wrong pull (#13308)

* Deny wrong pull

* Update routers/api/v1/repo/pull.go

Co-authored-by: zeripath <art27@cantab.net>

Co-authored-by: Markus <git+markus@obermui.de>
Co-authored-by: zeripath <art27@cantab.net>
---
 routers/api/v1/repo/pull.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index e2cab70adc..b2b71180a4 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -284,6 +284,12 @@ func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption
 	//   "422":
 	//     "$ref": "#/responses/validationError"
 
+	if form.Head == form.Base {
+		ctx.Error(http.StatusUnprocessableEntity, "BaseHeadSame",
+			"Invalid PullRequest: There are no changes between the head and the base")
+		return
+	}
+
 	var (
 		repo        = ctx.Repo.Repository
 		labelIDs    []int64