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From: Clemens Fruhwirth <>
Cc: Clemens Fruhwirth <>
Subject: [PATCH] fetch: Fix segfault on pull --set-upstream outside a branch.
Date: Tue,  6 Jul 2021 18:22:38 +0200	[thread overview]
Message-ID: <> (raw)

branch_get("HEAD") can return NULL, when we are outside a branch and
the user calls pull --set-upstream. Catch this case and warn the user
to avoid a segfault.

Signed-off-by: Clemens Fruhwirth <>
 builtin/fetch.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/builtin/fetch.c b/builtin/fetch.c
index 9191620e50..1097235b90 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -1602,6 +1602,10 @@ static int do_fetch(struct transport *transport,
 		struct ref *rm;
 		struct ref *source_ref = NULL;
+		if (!branch) {
+			warning(_("no branch detected to use --set-upstream with."));
+			goto skip;
+		}
 		 * We're setting the upstream configuration for the
 		 * current branch. The relevant upstream is the

             reply	other threads:[~2021-07-06 16:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-06 16:22 Clemens Fruhwirth [this message]
2021-07-06 17:57 ` [PATCH] fetch: Fix segfault on pull --set-upstream outside a branch Junio C Hamano
2021-07-06 18:03   ` Eric Sunshine
2021-07-06 19:48   ` Junio C Hamano
2021-07-06 19:50     ` Junio C Hamano

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