Failed to display cast error

[redso-mankit]

2020-10-09 20:49:38 +0800 [error]: Failed to set log entry field for http_request.undefined local variable or method `err' for #Fluent::GoogleCloudOutput:000000042cd6a8

https://github.com/GoogleCloudPlatform/fluent-plugin-google-cloud/blob/master/lib/fluent/plugin/out_google_cloud.rb#L1445

            rescue TypeError
              @log.error "Failed to #{cast_fn} for #{field_name}." \
                         "#{original_key} with value #{value.inspect}.", err

should be

            rescue TypeError => err
              @log.error "Failed to #{cast_fn} for #{field_name}." \
                         "#{original_key} with value #{value.inspect}.", err