Fix daemon crashes when linum-mode is turned on early on

* src/window.c (Fwindow_end): Don't try calling display engine
functions on initial-frame frame.  (Bug#20565)

1 files changed, 5 insertions, 1 deletions

diff --git a/src/window.c b/src/window.c
index 0fcf82d43f4..b8281661b4d 100644
--- a/src/window.c
+++ b/src/window.c
@@ -1748,7 +1748,11 @@ if it isn't already recorded.  */)
           || b->clip_changed
           || b->prevent_redisplay_optimizations_p
           || window_outdated (w))
-      && !noninteractive)
+      /* Don't call display routines if we didn't yet create any real
+         frames, because the glyph matrices are not yet allocated in
+         that case.  This could happen in some code that runs in the
+         daemon during initialization (e.g., see bug#20565).  */
+      && !(noninteractive || FRAME_INITIAL_P (WINDOW_XFRAME (w))))
     {
       struct text_pos startp;
       struct it it;