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bug#18036: 24.4.50; Too large fringe width causes hang in redisplay


From: Eli Zaretskii
Subject: bug#18036: 24.4.50; Too large fringe width causes hang in redisplay
Date: Wed, 16 Jul 2014 21:42:49 +0300

> Date: Wed, 16 Jul 2014 21:47:09 +0400
> From: Dmitry Antipov <address@hidden>
> 
> Recently I erroneously set left-fringe-width to some large number
> (don't remember an exact value), and got infloop in redisplay afterwards:
> 
> #0  0x000000000045578a in move_it_to (it=0x7fff7386b590, to_charpos=192, 
> to_x=-1, to_y=-1, to_vpos=-1, op=8)
>      at ../../trunk/src/xdisp.c:9319
> #1  0x0000000000455af0 in move_it_vertically_backward (it=0x7fff7386d090, 
> dy=306) at ../../trunk/src/xdisp.c:9400
> #2  0x000000000046bdf2 in redisplay_window (window=..., 
> just_this_one_p=false) at ../../trunk/src/xdisp.c:16475
> #3  0x0000000000462d28 in redisplay_window_0 (window=...) at 
> ../../trunk/src/xdisp.c:14247
> #4  0x0000000000609711 in internal_condition_case_1 (bfun=0x462ce6 
> <redisplay_window_0>, arg=..., handlers=...,
>      hfun=0x462cb5 <redisplay_window_error>) at ../../trunk/src/eval.c:1373
> #5  0x0000000000462c93 in redisplay_windows (window=...) at 
> ../../trunk/src/xdisp.c:14227
> #6  0x0000000000461aed in redisplay_internal () at 
> ../../trunk/src/xdisp.c:13826
> #7  0x000000000045f830 in redisplay () at ../../trunk/src/xdisp.c:13112
> #8  0x000000000056af5c in read_char (commandflag=1, map=..., prev_event=..., 
> used_mouse_menu=0x7fff7386f4bf, end_time=0x0)
>      at ../../trunk/src/keyboard.c:2560
> #9  0x000000000057a593 in read_key_sequence (keybuf=0x7fff7386f6a0, 
> bufsize=30, prompt=..., dont_downcase_last=false,
>      can_return_switch_frame=true, fix_current_buffer=true, 
> prevent_redisplay=false) at ../../trunk/src/keyboard.c:9084
> #10 0x0000000000567f1e in command_loop_1 () at ../../trunk/src/keyboard.c:1438
> #11 0x00000000006095a0 in internal_condition_case (bfun=0x567b5c 
> <command_loop_1>, handlers=..., hfun=0x56732c <cmd_error>)
>      at ../../trunk/src/eval.c:1349
> #12 0x00000000005677fa in command_loop_2 (ignore=...) at 
> ../../trunk/src/keyboard.c:1169
> #13 0x0000000000608a23 in internal_catch (tag=..., func=0x5677d7 
> <command_loop_2>, arg=...) at ../../trunk/src/eval.c:1113
> #14 0x00000000005677ae in command_loop () at ../../trunk/src/keyboard.c:1148
> #15 0x0000000000566e58 in recursive_edit_1 () at 
> ../../trunk/src/keyboard.c:769
> #16 0x0000000000567028 in Frecursive_edit () at ../../trunk/src/keyboard.c:840
> #17 0x0000000000564f2f in main (argc=4, argv=0x7fff7386fb28) at 
> ../../trunk/src/emacs.c:1650
> 
> Recipe to reproduce is very simple:
> 
> ./src/emacs -Q --eval '(progn (setq left-fringe-width 1000) (switch-to-buffer 
> "test") (kill-buffer))'

Thanks, this is now fixed in the emacs-24 branch (r117381).





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