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bug#7044: 24.0.50; Emacs crashes after calling ediff-regions-linewise
From: |
Juanma Barranquero |
Subject: |
bug#7044: 24.0.50; Emacs crashes after calling ediff-regions-linewise |
Date: |
Sun, 26 Sep 2010 01:41:39 +0200 |
> 1. emacs -Q
> 2. M-x ediff-regions-linewise, type RET twice to use *scratch* for both
> Ediff buffers (it doesn't matter which buffers are used).
> 3. Any attempt to mark a region, indeed it seems any further input at
> all, makes Emacs abort. This is completely reproducible. Full
> backtrace attached.
On keyboard.c:command_loop, line 1789,
current_buffer->mark_active => t
Vtransient_mark_mode => t
Vdeactivate_mark => nil
Vselect_active_regions => t
When line 1814 is reached, current_buffer->mark contains a marker that
points to no buffer
(gdb) p current_buffer->mark
$8 = 48498715
(gdb) pr
#<marker in no buffer>
so
Fmarker_position (current_buffer->mark)
returns nil, and so beg is assigned XINT (nil), which is a bug.
Now, shouldn't current_buffer->mark_active be nil if the mark points nowhere?
Juanma