From d6bd56a0e2d710d17c9dc61cfc7fea1b8e3f4629 Mon Sep 17 00:00:00 2001
From: Jon Seymour <jon.seymour@gmail.com>
Date: Mon, 20 Jun 2005 12:29:31 +1000
Subject: [PATCH] Fixes problem with --merge-order head ^head

git-rev-list --merge-order HEAD ^HEAD was faulting rather than generating an empty output.

This patch fixes that problem.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/epoch.c b/epoch.c
index 5b71ad5..82becf6 100644
--- a/epoch.c
+++ b/epoch.c
@@ -606,7 +606,9 @@ int sort_list_in_merge_order(struct commit_list *list, emitter_func emitter)
 		}
 	}
 
-	if (!reversed->next) {
+	if (!reversed)
+		return ret;
+	else if (!reversed->next) {
 		/*
 		 * If there is only one element in the list, we can sort it
 		 * using sort_in_merge_order.
-- 
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