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

2 files changed, 2 insertions, 1 deletions

diff --git a/lib/bitbucket/representation/issue.rb b/lib/bitbucket/representation/issue.rb
index 054064395c3..44bcbc250b3 100644
--- a/lib/bitbucket/representation/issue.rb
+++ b/lib/bitbucket/representation/issue.rb
@@ -12,7 +12,7 @@ module Bitbucket
       end
 
       def author
-        raw.fetch('reporter', {}).fetch('username', nil)
+        raw.dig('reporter', 'username')
       end
 
       def description
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