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bug#653: hang in latest CVS

From: Gilbert Harman
Subject: bug#653: hang in latest CVS
Date: Tue, 5 Aug 2008 14:33:37 -0400

"GNU Emacs (i386-apple-darwin9.4.0, *Step 9.0)
 of 2008-08-05 on phi-qp617070u2s.Princeton.EDU"
Using an Apple intel iMac running OS 10.5.4

Running for a couple of hours, then when I tried to a region containing the following expressions, emacs hung.
gdb output follows the expressions whose evaluation appears to have caused the problem.  I just tried the same thing again and the problem is repeatable.

(setq white-background nil)
(setq mac-allow-anti-aliasing t)

;; colors
;; (add-to-list 'default-frame-alist '(background-color . "black"))
;; ;; (add-to-list 'default-frame-alist '(background-color . "gray16"))
(add-to-list 'default-frame-alist '(foreground-color . "lightyellow"))
(add-to-list 'default-frame-alist '(cursor-color . "Yellow3"))
;;(add-to-list 'default-frame-alist '(background-color . "DarkSlateGray"))

(add-to-list 'default-frame-alist
           '(background-color . "black"))

;; (if (equal emacs-build-system "petit.local")
;;     (add-to-list 'default-frame-alist
;;          '(background-color . "gray14"))
;;   (add-to-list 'default-frame-alist
;;            '(background-color . "black")))
(if running-gnu (progn
(set-face-background 'region "rgb:8/6/5")
(set-face-foreground 'region "lightyellow")
(set-face-foreground 'modeline "lightgoldenrod")
(set-face-background 'modeline "gray21")
(set-face-foreground 'highlight "lightyellow")
(set-face-background 'highlight "yellow4")
(set-face-foreground 'bold "white")
(set-face-foreground 'italic "tan1")
;; (if (equal emacs-build-system "petit.local")
;;  (set-face-background 'fringe  "gray14"))

> gdb ../nextstep/Emacs.app/Contents/MacOS/Emacs
GNU gdb 6.3.50-20050815 (Apple version gdb-768) (Tue Oct  2 04:07:49 UTC 2007)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-apple-darwin"...Reading symbols for shared libraries ........... done

DISPLAY = /tmp/launch-Bl86LW/:0
TERM = xterm-color
Breakpoint 1 at 0xf6486
Breakpoint 2 at 0xaa2df: file sysdep.c, line 1130.
(gdb) run
Starting program: /Users/gilbertharman/emacs/nextstep/Emacs.app/Contents/MacOS/Emacs
Reading symbols for shared libraries ++++++++++................................................................. done
Breakpoint 1 at 0x90f3043a
Reading symbols for shared libraries .. done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0xc0000003
0x96a066e4 in objc_msgSend ()
(gdb) bt
#0  0x96a066e4 in objc_msgSend ()
#1  0x0016d70e in ns_draw_glyph_string (s=0xbfffe530) at nsterm.m:2919
#2  0x0003c0c5 in draw_glyphs (w=0x8b3d50, x=378, row=0x3442c50, area=TEXT_AREA, start=0, end=39, hl=DRAW_NORMAL_TEXT, overlaps=0) at xdisp.c:20475
#3  0x0003d9a6 in x_write_glyphs (start=0x341f000, len=39) at xdisp.c:21819
#4  0x00007151 in update_window_line (w=0x0, vpos=14, mouse_face_overwritten_p=0xbfffe9dc) at dispnew.c:4453
#5  0x00007ae0 in update_window (w=0x8b3d50, force_p=0) at dispnew.c:4309
#6  0x00009233 in update_window_tree (w=0x8b3d50, force_p=0) at dispnew.c:4002
#7  0x0000a492 in update_frame (f=0x8b3bd0, force_p=0, inhibit_hairy_id_p=0) at dispnew.c:3930
#8  0x00035926 in redisplay_internal (preserve_echo_area=<value temporarily unavailable, due to optimizations>) at xdisp.c:11854
#9  0x0009b2bc in read_char (commandflag=1, nmaps=3, maps=0xbffff130, prev_event=25165833, used_mouse_menu=0xbffff228, end_time=0x0) at keyboard.c:2652
#10 0x0009dcfb in read_key_sequence (keybuf=0xbffff2e8, bufsize=30, prompt=25165833, dont_downcase_last=0, can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:9349
#11 0x000a01ea in command_loop_1 () at keyboard.c:1620
#12 0x0010208d in internal_condition_case (bfun=0x9ffb0 <command_loop_1>, handlers=25205497, hfun=0x96c60 <cmd_error>) at eval.c:1511
#13 0x0008fff8 in command_loop_2 () at keyboard.c:1338
#14 0x00101f6c in internal_catch (tag=-1073741821, func=0x8ffb0 <command_loop_2>, arg=25165833) at eval.c:1247
#15 0x0008fd4e in command_loop () at keyboard.c:1317
#16 0x0008fe12 in recursive_edit_1 () at keyboard.c:942
#17 0x0008ff91 in Frecursive_edit () at keyboard.c:1004
#18 0x0008ec3b in main (argc=1, argv=0xbffff6f4) at emacs.c:1688
(gdb) kill
Kill the program being debugged? (y or n) y
error while killing target (killing anyway): assertion failure on line 275 of "/SourceCache/gdb/gdb-768/src/gdb/macosx/macosx-nat-inferior-util.c" in function "macosx_inferior_suspend_ptrace": status.value.sig == TARGET_SIGNAL_STOP

warning: error on line 1849 of "/SourceCache/gdb/gdb-768/src/gdb/macosx/macosx-nat-inferior.c" in function "macosx_kill_inferior_safe": (os/kern) failure (0x5x)
(gdb) quit

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