From c47839389abb8e21a94606a2c105e5c1ecf6ed32 Mon Sep 17 00:00:00 2001
From: Simon McVittie <smcv@debian.org>
Date: Mon, 26 Dec 2016 18:20:41 +0000
Subject: [PATCH 1/1] git: don't issue a warning if rcsinfo is undefined

The intention here seems to be that $prev may be undefined, and the
only way that can legitimately happen is for $params{token} to be
undefined too.

(cherry picked from commit fd14cd2a4355684951bb40a1e72e8b0960a674fd)
---
 IkiWiki/Plugin/git.pm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/IkiWiki/Plugin/git.pm b/IkiWiki/Plugin/git.pm
index 95307d1ba..5ec68b0ce 100644
--- a/IkiWiki/Plugin/git.pm
+++ b/IkiWiki/Plugin/git.pm
@@ -567,7 +567,10 @@ sub rcs_commit (@) {
 	# Check to see if the page has been changed by someone else since
 	# rcs_prepedit was called.
 	my $cur    = git_sha1_file($params{file});
-	my ($prev) = $params{token} =~ /^($sha1_pattern)$/; # untaint
+	my $prev;
+	if (defined $params{token}) {
+		($prev) = $params{token} =~ /^($sha1_pattern)$/; # untaint
+	}
 
 	if (defined $cur && defined $prev && $cur ne $prev) {
 		my $conflict = merge_past($prev, $params{file}, $dummy_commit_msg);
-- 
2.39.5