bug#8786: 24.0.50; infinite loop in try_scrolling

bug#8786: 24.0.50; infinite loop in try_scrolling

[Dirk-Jan C. Binnema]

Sometimes, when I'm running erc, it seems to hit an infinite loop in the
function try_scrolling. I have no exact steps to reproduce, but at least it
seems to happen when invoking 'anything' (C-x b in my case).

Below, the backtrace I get with gdb when I attach it to the process:

#0  try_scrolling (window=198371293, just_this_one_p=0, arg_scroll_conservatively=101, scroll_step=0, temp_scroll_step=0, last_line_misfit=1) at xdisp.c:13118
#1  0x0809ba72 in redisplay_window (window=198371293, just_this_one_p=0) at xdisp.c:14166
#2  0x0809cda3 in redisplay_window_0 (window=198371293) at xdisp.c:12343
#3  0x081a8057 in internal_condition_case_1 (bfun=0x809cd80 <redisplay_window_0>, arg=198371293, handlers=138476358, hfun=0x80691a0 <redisplay_window_error>) at eval.c:1552
#4  0x0806d88f in redisplay_windows (window=<value optimized out>) at xdisp.c:12323
#5  0x0806d8ad in redisplay_windows (window=<value optimized out>) at xdisp.c:12317
#6  0x08086498 in redisplay_internal () at xdisp.c:11900
#7  0x080870e5 in redisplay_preserve_echo_area (from_where=2) at xdisp.c:12155
#8  0x08057118 in Fredisplay (force=138494154) at dispnew.c:6034
#9  0x081a9c10 in Ffuncall (nargs=1, args=0xbff4c810) at eval.c:3039
#10 0x081e0d9e in exec_byte_code (bytestr=<value optimized out>, vector=136589717, maxdepth=20, args_template=138494154, nargs=0, args=<value optimized out>) at bytecode.c:783
#11 0x081a95f7 in funcall_lambda (fun=136589637, nargs=1, arg_vector=0xbff4c920) at eval.c:3272
#12 0x081a8a85 in apply_lambda (fun=136589637, args=<value optimized out>) at eval.c:3149
#13 0x081a8da2 in eval_sub (form=176182830) at eval.c:2450
#14 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#15 0x081a3c36 in Fsave_excursion (args=176182886) at editfns.c:988
#16 0x081a9199 in eval_sub (form=176182918) at eval.c:2333
#17 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#18 0x081a9199 in eval_sub (form=189626702) at eval.c:2333
#19 0x081a9199 in eval_sub (form=189626646) at eval.c:2333
#20 0x081a8f36 in eval_sub (form=176182990) at eval.c:2447
#21 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#22 0x081a4fc6 in Fsave_restriction (body=176182998) at editfns.c:3366
#23 0x081a9199 in eval_sub (form=176183014) at eval.c:2333
#24 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#25 0x081a9199 in eval_sub (form=189733710) at eval.c:2333
#26 0x081ac192 in Funwind_protect (args=189733702) at eval.c:1360
#27 0x081a9199 in eval_sub (form=189733662) at eval.c:2333
#28 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#29 0x0819d7e6 in Fsave_current_buffer (args=189733654) at editfns.c:1003
#30 0x081a9199 in eval_sub (form=189733646) at eval.c:2333
#31 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#32 0x081ac418 in Flet (args=189626846) at eval.c:1109
#33 0x081a9199 in eval_sub (form=189626838) at eval.c:2333
#34 0x081a8f36 in eval_sub (form=189143238) at eval.c:2447
#35 0x081a8f36 in eval_sub (form=176183030) at eval.c:2447
#36 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#37 0x081ac418 in Flet (args=176183038) at eval.c:1109
#38 0x081a9199 in eval_sub (form=176183070) at eval.c:2333
#39 0x081a9199 in eval_sub (form=176183102) at eval.c:2333
#40 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#41 0x081a9750 in funcall_lambda (fun=176182758, nargs=2, arg_vector=0xbff4d648) at eval.c:3265
#42 0x081a9a0b in Ffuncall (nargs=3, args=0xbff4d644) at eval.c:3100
#43 0x081a9fb8 in funcall_nil (nargs=3, args=0xbff4d644) at eval.c:2555
#44 0x081a845f in run_hook_with_args (nargs=3, args=0xbff4d644, funcall=0x81a9fa0 <funcall_nil>) at eval.c:2744
#45 0x081a8620 in Frun_hook_with_args (nargs=3, args=0xbff4d644) at eval.c:2605
#46 0x081a86ab in run_hook_with_args_2 (hook=138659322, arg1=198371293, arg2=48256) at eval.c:2763
#47 0x080aae5a in set_window_buffer (window=198371293, buffer=179154021, run_hooks_p=1, keep_margins_p=1) at window.c:3445
#48 0x080ab0da in Fset_window_buffer (window=<value optimized out>, buffer_or_name=179154021, keep_margins=138494178) at window.c:3495
#49 0x080ab334 in Fsplit_window (window=139803469, size=138494154, horizontal=138494154) at window.c:3895
#50 0x081a9be9 in Ffuncall (nargs=3, args=0xbff4d7d0) at eval.c:3046
#51 0x081e0d9e in exec_byte_code (bytestr=<value optimized out>, vector=137079557, maxdepth=28, args_template=138494154, nargs=0, args=<value optimized out>) at bytecode.c:783
#52 0x081a95f7 in funcall_lambda (fun=137079501, nargs=0, arg_vector=0xbff4d964) at eval.c:3272
#53 0x081a9a0b in Ffuncall (nargs=1, args=0xbff4d960) at eval.c:3100
#54 0x081e0d9e in exec_byte_code (bytestr=<value optimized out>, vector=137077509, maxdepth=16, args_template=138494154, nargs=0, args=<value optimized out>) at bytecode.c:783
#55 0x081a95f7 in funcall_lambda (fun=137077461, nargs=1, arg_vector=0xbff4daf4) at eval.c:3272
#56 0x081a9a0b in Ffuncall (nargs=2, args=0xbff4daf0) at eval.c:3100
#57 0x081a9163 in eval_sub (form=137077990) at eval.c:2358
#58 0x081ac07d in internal_lisp_condition_case (var=138494154, bodyform=137077990, handlers=136588870) at eval.c:1454
#59 0x081e1186 in exec_byte_code (bytestr=<value optimized out>, vector=137077941, maxdepth=12, args_template=138494154, nargs=0, args=<value optimized out>) at bytecode.c:979
#60 0x081a95f7 in funcall_lambda (fun=137077893, nargs=1, arg_vector=0xbff4de24) at eval.c:3272
#61 0x081a9a0b in Ffuncall (nargs=2, args=0xbff4de20) at eval.c:3100
#62 0x081e0d9e in exec_byte_code (bytestr=<value optimized out>, vector=137078821, maxdepth=20, args_template=138494154, nargs=0, args=<value optimized out>) at bytecode.c:783
#63 0x081a95f7 in funcall_lambda (fun=137078757, nargs=2, arg_vector=0xbff4dfb4) at eval.c:3272
#64 0x081a9a0b in Ffuncall (nargs=3, args=0xbff4dfb0) at eval.c:3100
#65 0x081e0d9e in exec_byte_code (bytestr=<value optimized out>, vector=137079341, maxdepth=20, args_template=138494154, nargs=0, args=<value optimized out>) at bytecode.c:783
#66 0x081a95f7 in funcall_lambda (fun=137079269, nargs=1, arg_vector=0xbff4e154) at eval.c:3272
#67 0x081a9a0b in Ffuncall (nargs=2, args=0xbff4e150) at eval.c:3100
#68 0x081a9163 in eval_sub (form=183899702) at eval.c:2358
#69 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#70 0x081a9750 in funcall_lambda (fun=183899494, nargs=1, arg_vector=0xbff4e314) at eval.c:3265
#71 0x081a9a0b in Ffuncall (nargs=2, args=0xbff4e310) at eval.c:3100
#72 0x081a9163 in eval_sub (form=183904262) at eval.c:2358
#73 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#74 0x081a9750 in funcall_lambda (fun=183899894, nargs=1, arg_vector=0xbff4e440) at eval.c:3265
#75 0x081a8a85 in apply_lambda (fun=183899894, args=<value optimized out>) at eval.c:3149
#76 0x081a8da2 in eval_sub (form=183699214) at eval.c:2450
#77 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#78 0x081a9199 in eval_sub (form=187785566) at eval.c:2333
#79 0x081ac192 in Funwind_protect (args=187785526) at eval.c:1360
#80 0x081a9199 in eval_sub (form=187785518) at eval.c:2333
#81 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#82 0x081ac418 in Flet (args=187785494) at eval.c:1109
#83 0x081a9199 in eval_sub (form=187785486) at eval.c:2333
#84 0x081a8f36 in eval_sub (form=183699278) at eval.c:2447
#85 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#86 0x081ac418 in Flet (args=183699286) at eval.c:1109
#87 0x081a9199 in eval_sub (form=183701782) at eval.c:2333
#88 0x081ac07d in internal_lisp_condition_case (var=138961130, bodyform=183701782, handlers=183678046) at eval.c:1454
#89 0x081ac13b in Fcondition_case (args=183701790) at eval.c:1395
#90 0x081a9199 in eval_sub (form=183701806) at eval.c:2333
#91 0x081ac192 in Funwind_protect (args=183678030) at eval.c:1360
#92 0x081a9199 in eval_sub (form=183701814) at eval.c:2333
#93 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#94 0x081a9750 in funcall_lambda (fun=183677366, nargs=0, arg_vector=0xbff4ee24) at eval.c:3265
#95 0x081a9a0b in Ffuncall (nargs=1, args=0xbff4ee20) at eval.c:3100
#96 0x081aaa37 in Fapply (nargs=2, args=0xbff4ee20) at eval.c:2486
#97 0x081a9163 in eval_sub (form=183560366) at eval.c:2358
#98 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#99 0x081a9199 in eval_sub (form=183606606) at eval.c:2333
#100 0x081a940d in Fprogn (args=<value optimized out>) at eval.c:372
#101 0x081a9750 in funcall_lambda (fun=183560310, nargs=0, arg_vector=0xbff4f0b4) at eval.c:3265
#102 0x081a9a0b in Ffuncall (nargs=1, args=0xbff4f0b0) at eval.c:3100
#103 0x081aa003 in apply1 (fn=173342914, arg=138494154) at eval.c:2774
#104 0x081a5945 in Fcall_interactively (function=173342914, record_flag=138494154, keys=138523365) at callint.c:379
#105 0x081a9be9 in Ffuncall (nargs=4, args=0xbff4f270) at eval.c:3046
#106 0x081a9ea1 in call3 (fn=138616762, arg1=173342914, arg2=138494154, arg3=138494154) at eval.c:2838
#107 0x081479b0 in command_loop_1 () at keyboard.c:1561
#108 0x081a7f61 in internal_condition_case (bfun=0x8147690 <command_loop_1>, handlers=138525266, hfun=0x813dc60 <cmd_error>) at eval.c:1507
#109 0x0813cb65 in command_loop_2 (ignore=138494154) at keyboard.c:1156
#110 0x081a7e91 in internal_catch (tag=138521618, func=0x813cb40 <command_loop_2>, arg=138494154) at eval.c:1261
#111 0x0813d786 in command_loop () at keyboard.c:1135
#112 recursive_edit_1 () at keyboard.c:756
#113 0x0813da82 in Frecursive_edit () at keyboard.c:820
#114 0x08138adb in main (argc=<value optimized out>, argv=0xbff4f9a4) at emacs.c:1686

when print 'it', I get:

$1 = {window = 198371293, w = 0xbd2e7d8, f = 0x85539c0, method = GET_FROM_BUFFER, stop_charpos = 14161, prev_stop = 0, base_level_stop = 0, end_charpos = 14161, s = 0x0, string_nchars = 0, region_beg_charpos = -1, region_end_charpos = -1, 
  redisplay_end_trigger_charpos = 0, multibyte_p = 1, header_line_p = 1, string_from_display_prop_p = 0, ellipsis_p = 0, avoid_cursor_p = 0, dp = 0x0, dpvec = 0x0, dpend = 0x0, dpvec_char_len = 0, dpvec_face_id = 0, saved_face_id = 14, ctl_chars = {
    0 <repeats 16 times>}, start = {pos = {charpos = 13416, bytepos = 13416}, overlay_string_index = -1, string_pos = {charpos = -1, bytepos = -1}, dpvec_index = -1}, current = {pos = {charpos = 14161, bytepos = 14161}, overlay_string_index = -1, string_pos = {
      charpos = -1, bytepos = -1}, dpvec_index = -1}, n_overlay_strings = 0, overlay_strings_charpos = 14161, overlay_strings = {0 <repeats 16 times>}, string_overlays = {0 <repeats 16 times>}, string = 138494154, from_overlay = 0, stack = {{string = 138494154, 
      string_nchars = 0, end_charpos = 14161, stop_charpos = 14147, prev_stop = 0, base_level_stop = 0, cmp_it = {stop_pos = 14156, id = -1, ch = -2, rule_idx = 0, lookback = 0, nglyphs = 0, reversed_p = 0, charpos = 0, nchars = 0, nbytes = 0, from = 0, to = 0, 
        width = 0}, face_id = 0, u = {image = {object = 0, slice = {x = 0, y = 0, width = 0, height = 0}, image_id = 0}, comp = {object = 0}, stretch = {object = 0}}, position = {charpos = 14147, bytepos = 14147}, current = {pos = {charpos = 14147, bytepos = 14147}, 
        overlay_string_index = -1, string_pos = {charpos = -1, bytepos = -1}, dpvec_index = -1}, from_overlay = 0, area = TEXT_AREA, method = GET_FROM_BUFFER, multibyte_p = 1, string_from_display_prop_p = 0, display_ellipsis_p = 0, avoid_cursor_p = 0, 
      line_wrap = WINDOW_WRAP, voffset = 0, space_width = 138494154, font_height = 138494154}, {string = 0, string_nchars = 0, end_charpos = 0, stop_charpos = 0, prev_stop = 0, base_level_stop = 0, cmp_it = {stop_pos = 0, id = 0, ch = 0, rule_idx = 0, lookback = 0, 
        nglyphs = 0, reversed_p = 0, charpos = 0, nchars = 0, nbytes = 0, from = 0, to = 0, width = 0}, face_id = 0, u = {image = {object = 0, slice = {x = 0, y = 0, width = 0, height = 0}, image_id = 0}, comp = {object = 0}, stretch = {object = 0}}, position = {
        charpos = 0, bytepos = 0}, current = {pos = {charpos = 0, bytepos = 0}, overlay_string_index = 0, string_pos = {charpos = 0, bytepos = 0}, dpvec_index = 0}, from_overlay = 0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, multibyte_p = 0, 
      string_from_display_prop_p = 0, display_ellipsis_p = 0, avoid_cursor_p = 0, line_wrap = TRUNCATE, voffset = 0, space_width = 0, font_height = 0}, {string = 0, string_nchars = 0, end_charpos = 0, stop_charpos = 0, prev_stop = 0, base_level_stop = 0, cmp_it = {
        stop_pos = 0, id = 0, ch = 0, rule_idx = 0, lookback = 0, nglyphs = 0, reversed_p = 0, charpos = 0, nchars = 0, nbytes = 0, from = 0, to = 0, width = 0}, face_id = 0, u = {image = {object = 0, slice = {x = 0, y = 0, width = 0, height = 0}, image_id = 0}, 
        comp = {object = 0}, stretch = {object = 0}}, position = {charpos = 0, bytepos = 0}, current = {pos = {charpos = 0, bytepos = 0}, overlay_string_index = 0, string_pos = {charpos = 0, bytepos = 0}, dpvec_index = 0}, from_overlay = 0, area = LEFT_MARGIN_AREA, 
      method = GET_FROM_BUFFER, multibyte_p = 0, string_from_display_prop_p = 0, display_ellipsis_p = 0, avoid_cursor_p = 0, line_wrap = TRUNCATE, voffset = 0, space_width = 0, font_height = 0}, {string = 0, string_nchars = 0, end_charpos = 0, stop_charpos = 0, 
      prev_stop = 0, base_level_stop = 0, cmp_it = {stop_pos = 0, id = 0, ch = 0, rule_idx = 0, lookback = 0, nglyphs = 0, reversed_p = 0, charpos = 0, nchars = 0, nbytes = 0, from = 0, to = 0, width = 0}, face_id = 0, u = {image = {object = 0, slice = {x = 0, y = 0, 
            width = 0, height = 0}, image_id = 0}, comp = {object = 0}, stretch = {object = 0}}, position = {charpos = 0, bytepos = 0}, current = {pos = {charpos = 0, bytepos = 0}, overlay_string_index = 0, string_pos = {charpos = 0, bytepos = 0}, dpvec_index = 0}, 
      from_overlay = 0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, multibyte_p = 0, string_from_display_prop_p = 0, display_ellipsis_p = 0, avoid_cursor_p = 0, line_wrap = TRUNCATE, voffset = 0, space_width = 0, font_height = 0}, {string = 0, string_nchars = 0, 
      end_charpos = 0, stop_charpos = 0, prev_stop = 0, base_level_stop = 0, cmp_it = {stop_pos = 0, id = 0, ch = 0, rule_idx = 0, lookback = 0, nglyphs = 0, reversed_p = 0, charpos = 0, nchars = 0, nbytes = 0, from = 0, to = 0, width = 0}, face_id = 0, u = {image = {
          object = 0, slice = {x = 0, y = 0, width = 0, height = 0}, image_id = 0}, comp = {object = 0}, stretch = {object = 0}}, position = {charpos = 0, bytepos = 0}, current = {pos = {charpos = 0, bytepos = 0}, overlay_string_index = 0, string_pos = {charpos = 0, 
          bytepos = 0}, dpvec_index = 0}, from_overlay = 0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, multibyte_p = 0, string_from_display_prop_p = 0, display_ellipsis_p = 0, avoid_cursor_p = 0, line_wrap = TRUNCATE, voffset = 0, space_width = 0, 
      font_height = 0}}, sp = 0, selective = 0, what = IT_EOB, face_id = 0, selective_display_ellipsis_p = 1, ctl_arrow_p = 1, face_box_p = 0, start_of_box_run_p = 0, end_of_box_run_p = 0, overlay_strings_at_end_processed_p = 1, ignore_overlay_strings_at_pos_p = 0, 
  glyph_not_available_p = 0, starts_in_middle_of_char_p = 0, face_before_selective_p = 0, constrain_row_ascent_descent_p = 0, line_wrap = WINDOW_WRAP, base_face_id = 0, c = 32, len = 1, cmp_it = {stop_pos = 14160, id = -1, ch = -2, rule_idx = 0, lookback = 0, 
    nglyphs = 0, reversed_p = 0, charpos = 0, nchars = 0, nbytes = 0, from = 0, to = 0, width = 0}, char_to_display = 32, glyphless_method = GLYPHLESS_DISPLAY_THIN_SPACE, image_id = 0, slice = {x = 138494154, y = 138494154, width = 138494154, height = 138494154}, 
  space_width = 138494154, voffset = 0, tab_width = 8, font_height = 138494154, object = 179154021, position = {charpos = 14161, bytepos = 14161}, truncation_pixel_width = 0, continuation_pixel_width = 0, first_visible_x = 0, last_visible_x = 651, last_visible_y = 284, 
  extra_line_spacing = 0, max_extra_line_spacing = 0, override_ascent = -1, override_descent = 0, override_boff = 0, glyph_row = 0xbdeeb44, area = TEXT_AREA, nglyphs = 1, pixel_width = 7, ascent = 12, descent = 3, max_ascent = 12, max_descent = 4, phys_ascent = 0, 
  phys_descent = 0, max_phys_ascent = 12, max_phys_descent = 3, current_x = 35, continuation_lines_width = 0, eol_pos = {charpos = 0, bytepos = 0}, current_y = 269, first_vpos = 1, vpos = 16, hpos = 5, left_user_fringe_bitmap = 0, right_user_fringe_bitmap = 0, 
  left_user_fringe_face_id = 0, right_user_fringe_face_id = 0, bidi_p = 0, bidi_it = {bytepos = 0, charpos = 0, ch = 0, ch_len = 0, type = UNKNOWN_BT, type_after_w1 = UNKNOWN_BT, orig_type = UNKNOWN_BT, resolved_level = 0, invalid_levels = 0, invalid_rl_levels = 0, 
    prev_was_pdf = 0, prev = {bytepos = 0, charpos = 0, type = UNKNOWN_BT, type_after_w1 = UNKNOWN_BT, orig_type = UNKNOWN_BT}, last_strong = {bytepos = 0, charpos = 0, type = UNKNOWN_BT, type_after_w1 = UNKNOWN_BT, orig_type = UNKNOWN_BT}, next_for_neutral = {
      bytepos = 0, charpos = 0, type = UNKNOWN_BT, type_after_w1 = UNKNOWN_BT, orig_type = UNKNOWN_BT}, prev_for_neutral = {bytepos = 0, charpos = 0, type = UNKNOWN_BT, type_after_w1 = UNKNOWN_BT, orig_type = UNKNOWN_BT}, next_for_ws = {bytepos = 0, charpos = 0, 
      type = UNKNOWN_BT, type_after_w1 = UNKNOWN_BT, orig_type = UNKNOWN_BT}, next_en_pos = 0, ignore_bn_limit = 0, sor = NEUTRAL_DIR, scan_dir = 0, stack_idx = 0, level_stack = {{level = 0, override = NEUTRAL_DIR} <repeats 64 times>}, first_elt = 0, 
    paragraph_dir = NEUTRAL_DIR, new_paragraph = 0, separator_limit = 0}, paragraph_embedding = NEUTRAL_DIR}


In GNU Emacs 24.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.24.4)
 of 2011-05-24 on cthulhu
Windowing system distributor `The X.Org Foundation', version 11.0.11001000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: en_DK.UTF-8
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8
  default enable-multibyte-characters: t

Major mode: Folder

Minor modes in effect:
  shell-dirtrack-mode: t
  global-hi-lock-mode: t
  yas/global-mode: t
  global-auto-complete-mode: t
  recentf-mode: t
  savehist-mode: t
  autopair-global-mode: t
  show-paren-mode: t
  global-hl-line-mode: t
  icomplete-mode: t
  cua-mode: t
  global-auto-revert-mode: t
  display-time-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
u s i c SPC d i r s <return> <return> <up> C-y C-/ 
C-/ C-/ C-/ <backspace> m u s i c SPC n a m e s <return> 
c l e a n i u <backspace> <backspace> u p - m u <backspace> 
<backspace> <backspace> <up> <down> - f i l n e <backspace> 
<backspace> e s SPC <backspace> ( ) SPC { <return> 
<return> <up> <delete> <tab> r e n a m e SPC ' <right> 
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bug#8786: 24.0.50; infinite loop in try_scrolling

[Eli Zaretskii]

> Date: Thu, 02 Jun 2011 16:35:13 +0300
> From: Dirk-Jan C. Binnema <djcb.bulk@gmail.com>
> 
> 
> Sometimes, when I'm running erc, it seems to hit an infinite loop in the
> function try_scrolling. I have no exact steps to reproduce, but at least it
> seems to happen when invoking 'anything' (C-x b in my case).
> 
> Below, the backtrace I get with gdb when I attach it to the process:

Thanks.  Could you please use the procedure described in etc/DEBUG
beginning with "If Emacs is in an infinite loop, try to determine
where the loop starts and ends", and report here where it loops?

Also, please invoke GDB from the src/ directory in the Emacs source
tree, so that it picks up the .gdbinit file that defines various
useful commands.  E.g., the backtrace shows the Lisp backtrace as
well.

> when print 'it', I get:

Please use the "pit" command to display the contents of `it' in a
human-readable form.  (That command is defined bu src/.gdbinit.)

bug#8786: 24.0.50; infinite loop in try_scrolling

[Dirk-Jan C. Binnema]

Hi Eli,

>>>>> On Thu, 2 Jun 2011 10:47:57 -0400, Eli Zaretskii ("EZ") wrote:

  >> Date: Thu, 02 Jun 2011 16:35:13 +0300
  >> From: Dirk-Jan C. Binnema <djcb.bulk@gmail.com>
  >> 
  >> 
  >> Sometimes, when I'm running erc, it seems to hit an infinite loop in the
  >> function try_scrolling. I have no exact steps to reproduce, but at least it
  >> seems to happen when invoking 'anything' (C-x b in my case).
  >> 
  >> Below, the backtrace I get with gdb when I attach it to the process:

  EZ> Thanks.  Could you please use the procedure described in etc/DEBUG
  EZ> beginning with "If Emacs is in an infinite loop, try to determine
  EZ> where the loop starts and ends", and report here where it loops?

Yes, as soon as I hit the problem again, I will attempt to do so.
  
  EZ> Also, please invoke GDB from the src/ directory in the Emacs source
  EZ> tree, so that it picks up the .gdbinit file that defines various
  EZ> useful commands.  E.g., the backtrace shows the Lisp backtrace as
  EZ> well.

  >> when print 'it', I get:

  EZ> Please use the "pit" command to display the contents of `it' in a
  EZ> human-readable form.  (That command is defined bu src/.gdbinit.)


Ok, I will try that.

Best wishes,
Dirk.

-- 
Dirk-Jan C. Binnema                  Helsinki, Finland
e:djcb@djcbsoftware.nl           w:www.djcbsoftware.nl
pgp: D09C E664 897D 7D39 5047 A178 E96A C7A1 017D DA3C

bug#8786: 24.0.50; infinite loop in try_scrolling

[Lars Ingebrigtsen]

Dirk-Jan C. Binnema <djcb@djcbsoftware.nl> writes:

>>>>>> On Thu, 2 Jun 2011 10:47:57 -0400, Eli Zaretskii ("EZ") wrote:
>
>   >> Date: Thu, 02 Jun 2011 16:35:13 +0300
>   >> From: Dirk-Jan C. Binnema <djcb.bulk@gmail.com>
>   >> 
>   >> 
>   >> Sometimes, when I'm running erc, it seems to hit an infinite loop in the
>   >> function try_scrolling. I have no exact steps to reproduce, but at least it
>   >> seems to happen when invoking 'anything' (C-x b in my case).
>   >> 
>   >> Below, the backtrace I get with gdb when I attach it to the process:
>
>   EZ> Thanks.  Could you please use the procedure described in etc/DEBUG
>   EZ> beginning with "If Emacs is in an infinite loop, try to determine
>   EZ> where the loop starts and ends", and report here where it loops?
>
> Yes, as soon as I hit the problem again, I will attempt to do so.

Are you still seeing this problem?  The last update on this bug report
was two years ago...

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

bug#8786: 24.0.50; infinite loop in try_scrolling

[Dirk-Jan C. Binnema]

On Monday Feb 03 2014, larsi@gnus.org wrote:

> Dirk-Jan C. Binnema <djcb@djcbsoftware.nl> writes:
>
>>>>>>> On Thu, 2 Jun 2011 10:47:57 -0400, Eli Zaretskii ("EZ") wrote:
>>
>>   >> Date: Thu, 02 Jun 2011 16:35:13 +0300
>>   >> From: Dirk-Jan C. Binnema <djcb.bulk@gmail.com>
>>   >> 
>>   >> 
>>   >> Sometimes, when I'm running erc, it seems to hit an infinite loop in the
>>   >> function try_scrolling. I have no exact steps to reproduce, but at least it
>>   >> seems to happen when invoking 'anything' (C-x b in my case).
>>   >> 
>>   >> Below, the backtrace I get with gdb when I attach it to the process:
>>
>>   EZ> Thanks.  Could you please use the procedure described in etc/DEBUG
>>   EZ> beginning with "If Emacs is in an infinite loop, try to determine
>>   EZ> where the loop starts and ends", and report here where it loops?
>>
>> Yes, as soon as I hit the problem again, I will attempt to do so.
>
> Are you still seeing this problem?  The last update on this bug report
> was two years ago...

Nope -- haven't seen this in a while. Feel free to close.

Cheers,
Dirk.

-- 
Dirk-Jan C. Binnema                  Helsinki, Finland
e:djcb@djcbsoftware.nl           w:www.djcbsoftware.nl
pgp: D09C E664 897D 7D39 5047 A178 E96A C7A1 017D DA3C