From f933b3617086a7995e81855be14576cfc51d8f43 Mon Sep 17 00:00:00 2001
From: Matt Baer <matt@write.as>
Date: Wed, 23 Jun 2021 17:38:22 -0400
Subject: [PATCH] Prevent out of bounds error when post has no title

---
 postrender.go      | 4 ++++
 postrender_test.go | 1 +
 2 files changed, 5 insertions(+)

diff --git a/postrender.go b/postrender.go
index 0992d30..1cb4f0e 100644
--- a/postrender.go
+++ b/postrender.go
@@ -182,6 +182,10 @@ func applyMarkdownSpecial(data []byte, skipNoFollow bool, baseURL string, cfg *c
 }
 
 func applyBasicMarkdown(data []byte) string {
+	if len(data) == 0 {
+		return ""
+	}
+
 	mdExtensions := 0 |
 		blackfriday.EXTENSION_STRIKETHROUGH |
 		blackfriday.EXTENSION_SPACE_HEADERS |
diff --git a/postrender_test.go b/postrender_test.go
index 240e755..262d550 100644
--- a/postrender_test.go
+++ b/postrender_test.go
@@ -18,6 +18,7 @@ func TestApplyBasicMarkdown(t *testing.T) {
 		in     string
 		result string
 	}{
+		{"empty", "", ""},
 		{"plain", "Hello, World!", "Hello, World!"},
 		{"multibyte", "こんにちは", `こんにちは`},
 		{"bold", "**안녕하세요**", `<strong>안녕하세요</strong>`},