Import bitbucket issues that are reported by an anonymous user

For these kind of issues, the "reporter" field is present but zero.
In such a case, "fetch" will not return the default value, but it will
return nil.
Hence, importing fails, because the "username" field of nil is referenced

Fixes issue #44381

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/gitlab/import_formatter.rb b/lib/gitlab/import_formatter.rb
index 3e54456e936..4e611e7f16c 100644
--- a/lib/gitlab/import_formatter.rb
+++ b/lib/gitlab/import_formatter.rb
@@ -9,6 +9,7 @@ module Gitlab
     end
 
     def author_line(author)
+      author ||= "Anonymous"
       "*Created by: #{author}*\n\n"
     end
   end