lib/brief/document/section/builder.rb in brief-1.10.0 vs lib/brief/document/section/builder.rb in brief-1.10.1

@@ -20,11 +20,11 @@
       @cycles = 0
 
       begin
         run
       rescue
-        raise BuilderError
+        raise BuilderError, $!
       end
     end
 
     def run
       source.length.times do
@@ -44,10 +44,15 @@
       end
 
       until even? || maxed_out?
         source.map! do |item|
           level, fragments = item
-          [level, fragments.first]
+
+          [level, (fragments && fragments.first)]
+        end
+
+        if source.any? {|i| i[1].nil? }
+          raise BuilderError, 'Fragments by level seems invalid'
         end
 
         source.each_with_index do |item, index|
           level, fragment = item
           n = index + 1