From 87b135d61aa12d8706b9b00fcaca75d6bda36a88 Mon Sep 17 00:00:00 2001
From: Marat Radchenko <marat@slonopotamus.org>
Date: Sun, 26 Apr 2020 19:36:18 +0300
Subject: [PATCH] resolves #332 avoid outputting 'true' for unsupported blocks

---
 CHANGELOG.adoc                     | 1 +
 lib/asciidoctor-epub3/converter.rb | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 25ff2eb0..50f873e4 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -11,6 +11,7 @@ For a detailed view of what has changed, refer to the {uri-repo}/commits/master[
 * add support for `[horizontal]` definition list (#165)
 * add proper handling of `:data-uri:` document attribute (#324)
 * add support for customizable document splitting into chapters via `epub-chapter-level` attribute (#327)
+* avoid outputting 'true' for unsupported blocks (#332)
 
 == 1.5.0.alpha.15 (2020-03-11) - @slonopotamus
 
diff --git a/lib/asciidoctor-epub3/converter.rb b/lib/asciidoctor-epub3/converter.rb
index d970c58a..be9f122f 100644
--- a/lib/asciidoctor-epub3/converter.rb
+++ b/lib/asciidoctor-epub3/converter.rb
@@ -105,7 +105,8 @@ def convert node, name = nil, _opts = {}
         if respond_to? method_name
           send method_name, node
         else
-          logger.warn %(conversion missing in backend #{@backend} for #{name})
+          logger.warn %(#{::File.basename node.attr('docfile')}: conversion missing in backend #{@backend} for #{name})
+          nil
         end
       end