Internal Error: NoMethodError (undefined method `match' for nil:NilClass)

[rg-ac]

On some pages I have an 'Internal Error' and in the logfile I see:

NoMethodError (undefined method match' for nil:NilClass): plugins/redmine_doc_pu/lib/latex_wiki_page.rb:10:in block in to_latex'
plugins/redmine_doc_pu/lib/latex_wiki_page.rb:9:in to_latex' plugins/redmine_doc_pu/app/models/doc_pu_wiki_page.rb:24:in to_latex'
plugins/redmine_doc_pu/lib/latex_doc.rb:67:in block in to_latex' plugins/redmine_doc_pu/lib/latex_doc.rb:66:in to_latex'
plugins/redmine_doc_pu/lib/latex_doc.rb:120:in build' plugins/redmine_doc_pu/app/models/doc_pu_document.rb:27:in build'
plugins/redmine_doc_pu/app/controllers/doc_pu_controller.rb:101:in build_remote' lib/redmine/sudo_mode.rb:63:in sudo_mode'

Environment:
Redmine version 3.2.8.stable
Ruby version 2.2.9-p480 (2017-12-15) [x86_64-linux]
Rails version 4.2.7.1
Environment production
Database adapter Mysql2
SCM:
Subversion 1.8.8
Git 1.9.1
Filesystem
Redmine plugins:
redmine_backlogs v1.0.6
redmine_base_deface 0.0.1
redmine_doc_pu 2.1.0
redmine_maintenance_mode 2.1.0

Any Ideas?

[rg-ac]

Here is a diff which fixed it for me

--- a/lib/latex_wiki_page.rb
+++ b/lib/latex_wiki_page.rb
@@ -7,8 +7,10 @@ module ModuleLatexWikiPage
# Collect all attached images and get disk filename
file_sub = {}
self.wiki_page.attachments.each do |att|
- unless att.content_type.match(/^image/i).nil?
- file_sub[att.filename] = att.diskfile
+ if att.content_type
+ unless att.content_type.match(/^image/i).nil?
+ file_sub[att.filename] = att.diskfile
+ end
end
end

btw. how to paste Diff in markdown?