From d203d38de68bf1c25439b70a3c7f64cb95c268db Mon Sep 17 00:00:00 2001
From: Nazar Kanaev <nkanaev@live.com>
Date: Thu, 1 Jul 2021 14:10:22 +0100
Subject: [PATCH] fix empty feed parsing

---
 doc/changelog.txt  | 1 +
 src/parser/feed.go | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/doc/changelog.txt b/doc/changelog.txt
index 08df8e2..b364784 100644
--- a/doc/changelog.txt
+++ b/doc/changelog.txt
@@ -5,6 +5,7 @@
 - (fix) handle opml files not following the spec (thanks to @huangnauh for the report)
 - (fix) pagination in unread/starred feeds (thanks to @Farow for the report)
 - (fix) handling feeds with non-utf8 encodings (thanks to @fserb for the report)
+- (fix) errors caused by empty feeds (thanks to @decke)
 - (fix) ui tweaks (thanks to @Farow)
 
 # v2.0 (2021-04-18)
diff --git a/src/parser/feed.go b/src/parser/feed.go
index 2d7cc00..bf77764 100644
--- a/src/parser/feed.go
+++ b/src/parser/feed.go
@@ -18,6 +18,11 @@ type processor func(r io.Reader) (*Feed, error)
 func sniff(lookup string) (string, processor) {
 	lookup = strings.TrimSpace(lookup)
 	lookup = strings.TrimLeft(lookup, "\x00\xEF\xBB\xBF\xFE\xFF")
+
+	if len(lookup) < 0 {
+		return "", nil
+	}
+
 	switch lookup[0] {
 	case '<':
 		decoder := xmlDecoder(strings.NewReader(lookup))