From: João Távora <joaotavora@gmail.com>
Date: Tue, 19 Jun 2018 19:59:27 +0000 (+0100)
Subject: Properly ignore stderr in elisp Flymake backend
X-Git-Tag: emacs-27.0.90~4788
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=3a47f3921bdaaf7b7d80dc3be05a5f1b1f2501eb;p=emacs.git

Properly ignore stderr in elisp Flymake backend

Naively passing `null-device' as stderr creates a buffer named
"/dev/null" instead.  Pass a hidden buffer name instead.  (Bug#31902).

* lisp/progmodes/elisp-mode.el (elisp-flymake-byte-compile): Pass
hidden buffer as make-process :stderr instead of null-device.
---

diff --git a/lisp/progmodes/elisp-mode.el b/lisp/progmodes/elisp-mode.el
index d74c523c8c8..8eded03b9c4 100644
--- a/lisp/progmodes/elisp-mode.el
+++ b/lisp/progmodes/elisp-mode.el
@@ -1717,7 +1717,7 @@ current buffer state and calls REPORT-FN when done."
                            (format "byte-compile process %s died" proc))))
               (ignore-errors (delete-file temp-file))
               (kill-buffer output-buffer))))
-        :stderr null-device
+        :stderr " *stderr of elisp-flymake-byte-compile*"
         :noquery t)))))
 
 (defun elisp-flymake--batch-compile-for-flymake (&optional file)