Fix startup buffers without spaceline mode line

core/core-dotspacemacs.el

@@ -521,7 +521,7 @@ Called with `C-u C-u' skips `dotspacemacs/user-config' _and_ preleminary tests."
             (spacemacs-buffer/warning "Some tests failed, check `%s' buffer"
                                       dotspacemacs-test-results-buffer))))))
   (when (configuration-layer/package-used-p 'spaceline)
-    (spacemacs//set-powerline-for-startup-buffers)))
+    (spacemacs//restore-buffers-powerline)))
 
 (defun dotspacemacs/get-variable-string-list ()
   "Return a list of all the dotspacemacs variables as strings."

layers/+spacemacs/spacemacs-modeline/funcs.el

@@ -49,12 +49,10 @@ Return nil if no scale is defined."
     (powerline-set-selected-window)
     (powerline-reset)))
 
-(defun spacemacs//set-powerline-for-startup-buffers ()
-  "Set the powerline for buffers created when Emacs starts."
-  (dolist (buffer '("*Messages*" "*spacemacs*" "*Compile-Log*"))
-    (when (and (get-buffer buffer)
-               (configuration-layer/package-used-p 'spaceline))
-      (spacemacs//restore-powerline buffer))))
+(defun spacemacs//restore-buffers-powerline ()
+  "Restore the powerline in all buffers."
+  (dolist (buffer (buffer-list))
+    (spacemacs//restore-powerline buffer)))
 
 (defun spacemacs//prepare-diminish ()
   (when spaceline-minor-modes-p

layers/+spacemacs/spacemacs-modeline/packages.el

@@ -140,7 +140,7 @@
         (spaceline-info-mode t))
       ;; Enable spaceline for buffers created before the configuration of
       ;; spaceline
-      (spacemacs//set-powerline-for-startup-buffers))))
+      (spacemacs//restore-buffers-powerline))))
 
 (defun spacemacs-modeline/pre-init-spaceline-all-the-icons ()
   (when (eq 'all-the-icons (spacemacs/get-mode-line-theme-name))