No: the "unclear" message "Failed to set env" is an error message *you* generated. You ignored the content of the "err" variable (which could have contained a detailed description of the error), and replaced it with your own bland text.
Try replacing it with something like this (untested): logger.Error.Fatalf("Failed to set env: %v", err) -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/07c78ff1-05df-4517-9627-ff0bbb759699n%40googlegroups.com.