bug#29661: 27.0.50; emacs crashing on exchange-point-and-mark

[martin rudalics <rudalics@gmx.at>]

[-- Attachment #1: Type: text/plain, Size: 565 bytes --]

 > Breakpoint 3, delete_frame (frame=<optimized out>, force=force@entry=XIL(0x98a0)) at frame.c:2062
 > 2062          FOR_EACH_FRAME (frames, frame1)
 > (gdb) p Vframe_list
 > $1 = XIL(0)
 > (gdb) c
 > Continuing.
 >
 > Program received signal SIGSEGV, Segmentation fault.
 > delete_frame (frame=<optimized out>, force=force@entry=XIL(0x98a0)) at frame.c:2064
 > 2064              struct frame *f1 = XFRAME (frame1);

Thanks.  The attached patch should fix that.  Please check.

But I have no idea how to proceed with the x_reply_selection_request
failure.

martin

[-- Attachment #2: frame.c.diff --]
[-- Type: text/plain, Size: 1394 bytes --]

diff --git a/src/frame.c b/src/frame.c
index 5bafbed..66d1b5c 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -2058,7 +2058,7 @@ of them (the selected terminal frame) is actually displayed.

   /* If we've deleted the last_nonminibuf_frame, then try to find
      another one.  */
-  if (f == last_nonminibuf_frame)
+  if (f == last_nonminibuf_frame && !NILP (Vframe_list))
     {
       last_nonminibuf_frame = 0;

@@ -2076,7 +2076,7 @@ of them (the selected terminal frame) is actually displayed.

   /* If there's no other frame on the same kboard, get out of
      single-kboard state if we're in it for this kboard.  */
-  if (kb != NULL)
+  if (kb != NULL && !NILP (Vframe_list))
     {
       /* Some frame we found on the same kboard, or nil if there are none.  */
       Lisp_Object frame_on_same_kboard = Qnil;
@@ -2093,7 +2093,9 @@ of them (the selected terminal frame) is actually displayed.
   /* If we've deleted this keyboard's default_minibuffer_frame, try to
      find another one.  Prefer minibuffer-only frames, but also notice
      frames with other windows.  */
-  if (kb != NULL && EQ (frame, KVAR (kb, Vdefault_minibuffer_frame)))
+  if (kb != NULL
+      && EQ (frame, KVAR (kb, Vdefault_minibuffer_frame))
+      && !NILP (Vframe_list))
     {
       /* The last frame we saw with a minibuffer, minibuffer-only or not.  */
       Lisp_Object frame_with_minibuf = Qnil;