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Diffstat (limited to 'modules/system-defaults.el')
| -rw-r--r-- | modules/system-defaults.el | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/modules/system-defaults.el b/modules/system-defaults.el index d9ec1878..47bd1505 100644 --- a/modules/system-defaults.el +++ b/modules/system-defaults.el @@ -89,6 +89,30 @@ indicate the warning was handled." (advice-add 'display-warning :before-until #'cj/log-comp-warning) +;; ------------------ Deferred Daemon Warnings vs. Frame Creation ----------------- + +;; Emacs 31's warnings.el defers warnings raised during daemon startup: it puts +;; a one-shot closure on `after-make-frame-functions' holding the *Warnings* +;; buffer object and calls `warning--display-buffer' on it when the first +;; client frame is made. If that buffer died in between, `display-buffer' +;; signals inside `make-frame', server.el reports "-window-system-unsupported", +;; and emacsclient retries on $DISPLAY -- the first frame of the session +;; silently opens on XWayland. Keeping *Warnings* alive is the root fix +;; (undead-buffers.el); this guard is the backstop, so no future buffer sweep +;; can break frame creation the same way. The function only exists from +;; Emacs 31; advising an undefined symbol is harmless and takes effect once +;; warnings.el defines it. + +(defun cj/warning--display-buffer-if-live (orig buffer) + "Call ORIG with BUFFER only when it names or is a live buffer. +Around advice for `warning--display-buffer'. BUFFER may be a buffer object +or a buffer name, like `display-buffer' accepts. Return nil when skipped." + (let ((buf (and buffer (get-buffer buffer)))) + (when (buffer-live-p buf) + (funcall orig buf)))) + +(advice-add 'warning--display-buffer :around #'cj/warning--display-buffer-if-live) + ;; ---------------------------------- Unicode ---------------------------------- (set-locale-environment "en_US.UTF-8") |