Why my own flymake backend fails? reddit / emacs ---------------------------------------------------------------------- [deleted] · 2022-12-15 17:42 [deleted] ---------------------------------------------------------------------- akirakom · 2022-12-15 20:19 You don't have lexical binding, so source is unbound inside the sentinel. A solution would be backtick quote of the lambda function. ---------------------------------------------------------------------- [deleted] · 2022-12-15 22:16 [deleted]