From 44004872c891ae1b06cd3aff9c597828558ddedb Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Wed, 14 Nov 2018 05:59:02 -0800
Subject: [PATCH] config: report a bug if git_dir exists without commondir

This did happen at some stage, and was fixed relatively quickly. Make
sure that we detect very quickly, too, should that happen again.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 config.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/config.c b/config.c
index 2ffd39c220..04286f7717 100644
--- a/config.c
+++ b/config.c
@@ -1668,6 +1668,8 @@ static int do_git_config_sequence(const struct config_options *opts,
 
 	if (opts->commondir)
 		repo_config = mkpathdup("%s/config", opts->commondir);
+	else if (opts->git_dir)
+		BUG("git_dir without commondir");
 	else
 		repo_config = NULL;
 
-- 
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