Martin Buchholz <martin(a)xemacs.org&gt; writes: OK, I tried that. First of all it is reproducible down to address. Aparently it is related to a GC triggered during some XPM-related stuff. This might also explain why this bug doesn't show up in xemacs -nw. btw this b38-pre2. If you need further info, drop me a mail. Gunnar I'm not sure wheter the size is right, but maybe this helps: (dbx) stop modify 6067492, sizeof(Lisp_Object) (2) stop modify 6067492, sizeof(Lisp_Object ) (dbx) (dbx) run Running: xemacs (process id 13833) watchpoint 6067492 (0x5c9524[4]) at line 456 in file "alloc.c" 456 (*ptr4++) = 0xDEADBEEF; (dbx) (dbx) where =>[1] deadbeef_memory(ptr = 0x5c9524, size = 16U), line 456 in "alloc.c" [2] sweep_strings(), line 4185 in "alloc.c" [3] gc_sweep(), line 4254 in "alloc.c" [4] garbage_collect_1(), line 4557 in "alloc.c" [5] Feval(form = 5610556), line 2919 in "eval.c" [6] evaluate_xpm_color_symbols(), line 1585 in "glyphs.c" [7] x_xpm_normalize(inst = 7683168, console_type = 6096420), line 1410 in "glyphs-x.c" [8] xpm_normalize(inst = 7683168, console_type = 6096420), line 1601 in "glyphs.c" [9] normalize_image_instantiator(instantiator = 7683168, contype = 6096420, dest_mask = 95), line 477 in "glyphs.c" [10] primitive_funcall(fn = 0x2210b8 = &`xemacs`glyphs.c`normalize_image_instantiator(Lisp_Object instantiator, Lisp_Object contype, Lisp_Object dest_mask), nargs = 3, args = 0xefffaeec), line 2862 in "eval.c" [11] call_with_suspended_errors_1(opaque_arg = 5974592), line 2061 in "eval.c" [12] internal_catch(tag = 5974720, func = 0xfd668 = &`xemacs`eval.c`call_with_suspended_errors_1(Lisp_Object opaque_arg), arg = 5974592, threw = 0xefffaed4), line 1328 in "eval.c" [13] call_with_suspended_errors(fun = 0x2210b8 = &`xemacs`glyphs.c`normalize_image_instantiator(Lisp_Object instantiator, Lisp_Object contype, Lisp_Object dest_mask), retval = 5992452, class = 5992452, errb = RECORD, nargs = 3, ...), line 2169 in "eval.c" [14] image_going_to_add(specifier = 7640448, locale = 6094400, tag_set = 5992452, instantiator = 7638484), line 1911 in "glyphs.c" [15] build_up_processed_list(specifier = 7640448, locale = 6094400, inst_list = 7685576), line 1600 in "specifier.c" [16] specifier_add_spec(specifier = 7640448, locale = 6094400, inst_list = 7685576, add_meth = SPEC_REMOVE_TAG_SET_PREPEND), line 1641 in "specifier.c" [17] Fadd_spec_list_to_specifier(specifier = 7640448, spec_list = 7685600, how_to_add = 5992452), line 1912 in "specifier.c" [18] funcall_recording_as(recorded_as = 6109552, nargs = 3, args = 0xefffb500), line 3197 in "eval.c" [19] Ffuncall(nargs = 4, args = 0xefffb500), line 3238 in "eval.c" [20] Fbyte_code(bytestr = 5112944, vector = 5113080, maxdepth = 17), line 416 in "bytecode.c" [21] funcall_lambda(fun = 5113252, nargs = 5, arg_vector = 0xefffb9a4), line 3599 in "eval.c" [22] funcall_recording_as(recorded_as = 6091848, nargs = 5, args = 0xefffb9a0), line 3200 in "eval.c" [23] Ffuncall(nargs = 6, args = 0xefffb9a0), line 3238 in "eval.c" [24] Fbyte_code(bytestr = 5140216, vector = 5140300, maxdepth = 13), line 416 in "bytecode.c" [25] funcall_lambda(fun = 5140368, nargs = 6, arg_vector = 0xefffbd5c), line 3599 in "eval.c" [26] funcall_recording_as(recorded_as = 6497828, nargs = 6, args = 0xefffbd58), line 3200 in "eval.c" [27] Ffuncall(nargs = 7, args = 0xefffbd58), line 3238 in "eval.c" [28] Fbyte_code(bytestr = 5141300, vector = 5141328, maxdepth = 15), line 416 in "bytecode.c" [29] funcall_lambda(fun = 5141372, nargs = 2, arg_vector = 0xefffc12c), line 3599 in "eval.c" [30] funcall_recording_as(recorded_as = 6091876, nargs = 2, args = 0xefffc128), line 3200 in "eval.c" [31] Ffuncall(nargs = 3, args = 0xefffc128), line 3238 in "eval.c" [32] Fbyte_code(bytestr = 5142472, vector = 5142504, maxdepth = 7), line 416 in "bytecode.c" [33] funcall_lambda(fun = 5142540, nargs = 1, arg_vector = 0xefffc6c0), line 3599 in "eval.c" [34] funcall_recording_as(recorded_as = 6468792, nargs = 1, args = 0xefffc6bc), line 3200 in "eval.c" [35] Ffuncall(nargs = 2, args = 0xefffc6bc), line 3238 in "eval.c" [36] Fbyte_code(bytestr = 5519576, vector = 5519724, maxdepth = 15), line 416 in "bytecode.c" [37] funcall_lambda(fun = 5519792, nargs = 6, arg_vector = 0xefffcb08), line 3599 in "eval.c" [38] funcall_recording_as(recorded_as = 6963172, nargs = 6, args = 0xefffcb04), line 3200 in "eval.c" [39] Ffuncall(nargs = 7, args = 0xefffcb04), line 3238 in "eval.c" [40] Fbyte_code(bytestr = 5647640, vector = 5647704, maxdepth = 19), line 416 in "bytecode.c" [41] funcall_lambda(fun = 5647956, nargs = 1, arg_vector = 0xefffcea4), line 3599 in "eval.c" [42] funcall_recording_as(recorded_as = 5647956, nargs = 1, args = 0xefffcea0), line 3200 in "eval.c" [43] Ffuncall(nargs = 2, args = 0xefffcea0), line 3238 in "eval.c" [44] call1(fn = 5647956, arg0 = 6938868), line 3912 in "eval.c" [45] mapcar1(leni = 17, vals = 0xefffcfb0, fn = 5647956, seq = 6942416), line 3235 in "fns.c" [46] Fmapcar(fn = 5647956, seq = 6942416), line 3285 in "fns.c" [47] funcall_recording_as(recorded_as = 6089884, nargs = 2, args = 0xefffd1c8), line 3197 in "eval.c" [48] Ffuncall(nargs = 3, args = 0xefffd1c8), line 3238 in "eval.c" [49] Fbyte_code(bytestr = 5648020, vector = 5648052, maxdepth = 7), line 416 in "bytecode.c" [50] funcall_lambda(fun = 5648092, nargs = 1, arg_vector = 0xefffd574), line 3599 in "eval.c" [51] funcall_recording_as(recorded_as = 6991172, nargs = 1, args = 0xefffd570), line 3200 in "eval.c" [52] Ffuncall(nargs = 2, args = 0xefffd570), line 3238 in "eval.c" [53] Fbyte_code(bytestr = 5647480, vector = 5647508, maxdepth = 7), line 416 in "bytecode.c" [54] funcall_lambda(fun = 5647544, nargs = 0, arg_vector = 0xefffda8c), line 3599 in "eval.c" [55] funcall_recording_as(recorded_as = 6988508, nargs = 0, args = 0xefffda88), line 3200 in "eval.c" [56] Ffuncall(nargs = 1, args = 0xefffda88), line 3238 in "eval.c" [57] Fbyte_code(bytestr = 5641072, vector = 5641192, maxdepth = 9), line 416 in "bytecode.c" [58] funcall_lambda(fun = 5641372, nargs = 0, arg_vector = 0xefffde68), line 3599 in "eval.c" [59] funcall_recording_as(recorded_as = 6116088, nargs = 0, args = 0xefffde64), line 3200 in "eval.c" [60] Ffuncall(nargs = 1, args = 0xefffde64), line 3238 in "eval.c" [61] call0(fn = 6116088), line 3897 in "eval.c" [62] x_finish_init_device(d = 0x5e8800, props = 5992452), line 595 in "device-x.c" [63] Fmake_device(type = 6096420, connection = 5992452, props = 5992452), line 580 in "device.c" [64] funcall_recording_as(recorded_as = 6075240, nargs = 2, args = 0xefffe0d8), line 3193 in "eval.c" [65] Ffuncall(nargs = 3, args = 0xefffe0d8), line 3238 in "eval.c" [66] Fbyte_code(bytestr = 5094848, vector = 5094872, maxdepth = 7), line 416 in "bytecode.c" [67] funcall_lambda(fun = 5094900, nargs = 1, arg_vector = 0xefffe4f4), line 3599 in "eval.c" [68] funcall_recording_as(recorded_as = 6449800, nargs = 1, args = 0xefffe4f0), line 3200 in "eval.c" [69] Ffuncall(nargs = 2, args = 0xefffe4f0), line 3238 in "eval.c" [70] Fbyte_code(bytestr = 5640508, vector = 5640564, maxdepth = 5), line 416 in "bytecode.c" [71] funcall_lambda(fun = 5640660, nargs = 0, arg_vector = 0xefffe9f4), line 3599 in "eval.c" [72] funcall_recording_as(recorded_as = 6988424, nargs = 0, args = 0xefffe9f0), line 3200 in "eval.c" [73] Ffuncall(nargs = 1, args = 0xefffe9f0), line 3238 in "eval.c" [74] Fbyte_code(bytestr = 5298512, vector = 5298628, maxdepth = 9), line 416 in "bytecode.c" [75] funcall_lambda(fun = 5298848, nargs = 0, arg_vector = 0xeffff01c), line 3599 in "eval.c" [76] funcall_recording_as(recorded_as = 6815296, nargs = 0, args = 0xeffff018), line 3200 in "eval.c" [77] Ffuncall(nargs = 1, args = 0xeffff018), line 3238 in "eval.c" [78] Fbyte_code(bytestr = 5296360, vector = 5296548, maxdepth = 13), line 416 in "bytecode.c" [79] funcall_lambda(fun = 5297088, nargs = 0, arg_vector = 0xeffff278), line 3599 in "eval.c" [80] apply_lambda(fun = 5297088, numargs = 0, unevalled_args = 5992452), line 3501 in "eval.c" [81] Feval(form = 6275124), line 3067 in "eval.c" [82] condition_case_1(handlers = 5992564, bfun = 0x100650 = &Feval(Lisp_Object form), barg = 6275124, hfun = 0xa5710 = &cmd_error(), harg = 5992452), line 1653 in "eval.c" [83] top_level_1(dummy = 5992452), line 206 in "cmdloop.c" [84] internal_catch(tag = 6070780, func = 0xa57f0 = &`xemacs`cmdloop.c`top_level_1(Lisp_Object dummy), arg = 5992452, threw = (nil)), line 1328 in "eval.c" [85] initial_command_loop(load_me = 5992452), line 285 in "cmdloop.c" [86] xemacs_21_0_b38_sparc_sun_solaris2_6(argc = 1, argv = 0xeffff7cc, envp = 0xeffff7d4, restart = 0), line 1673 in "emacs.c" [87] main(argc = 1, argv = 0xeffff7cc, envp = 0xeffff7d4), line 2090 in "emacs.c" (dbx) (dbx) cont watchpoint 6067492 (0x5c9524[4]) at line 4185 in file "alloc.c" 4185 SWEEP_FIXED_TYPE_BLOCK (string, struct Lisp_String); (dbx) (dbx) where =>[1] sweep_strings(), line 4185 in "alloc.c" [2] gc_sweep(), line 4254 in "alloc.c" [3] garbage_collect_1(), line 4557 in "alloc.c" [4] Feval(form = 5610556), line 2919 in "eval.c" [5] evaluate_xpm_color_symbols(), line 1585 in "glyphs.c" [6] x_xpm_normalize(inst = 7683168, console_type = 6096420), line 1410 in "glyphs-x.c" [7] xpm_normalize(inst = 7683168, console_type = 6096420), line 1601 in "glyphs.c" [8] normalize_image_instantiator(instantiator = 7683168, contype = 6096420, dest_mask = 95), line 477 in "glyphs.c" [9] primitive_funcall(fn = 0x2210b8 = &`xemacs`glyphs.c`normalize_image_instantiator(Lisp_Object instantiator, Lisp_Object contype, Lisp_Object dest_mask), nargs = 3, args = 0xefffaeec), line 2862 in "eval.c" [10] call_with_suspended_errors_1(opaque_arg = 5974592), line 2061 in "eval.c" [11] internal_catch(tag = 5974720, func = 0xfd668 = &`xemacs`eval.c`call_with_suspended_errors_1(Lisp_Object opaque_arg), arg = 5974592, threw = 0xefffaed4), line 1328 in "eval.c" [12] call_with_suspended_errors(fun = 0x2210b8 = &`xemacs`glyphs.c`normalize_image_instantiator(Lisp_Object instantiator, Lisp_Object contype, Lisp_Object dest_mask), retval = 5992452, class = 5992452, errb = RECORD, nargs = 3, ...), line 2169 in "eval.c" [13] image_going_to_add(specifier = 7640448, locale = 6094400, tag_set = 5992452, instantiator = 7638484), line 1911 in "glyphs.c" [14] build_up_processed_list(specifier = 7640448, locale = 6094400, inst_list = 7685576), line 1600 in "specifier.c" [15] specifier_add_spec(specifier = 7640448, locale = 6094400, inst_list = 7685576, add_meth = SPEC_REMOVE_TAG_SET_PREPEND), line 1641 in "specifier.c" [16] Fadd_spec_list_to_specifier(specifier = 7640448, spec_list = 7685600, how_to_add = 5992452), line 1912 in "specifier.c" [17] funcall_recording_as(recorded_as = 6109552, nargs = 3, args = 0xefffb500), line 3197 in "eval.c" [18] Ffuncall(nargs = 4, args = 0xefffb500), line 3238 in "eval.c" [19] Fbyte_code(bytestr = 5112944, vector = 5113080, maxdepth = 17), line 416 in "bytecode.c" [20] funcall_lambda(fun = 5113252, nargs = 5, arg_vector = 0xefffb9a4), line 3599 in "eval.c" [21] funcall_recording_as(recorded_as = 6091848, nargs = 5, args = 0xefffb9a0), line 3200 in "eval.c" [22] Ffuncall(nargs = 6, args = 0xefffb9a0), line 3238 in "eval.c" [23] Fbyte_code(bytestr = 5140216, vector = 5140300, maxdepth = 13), line 416 in "bytecode.c" [24] funcall_lambda(fun = 5140368, nargs = 6, arg_vector = 0xefffbd5c), line 3599 in "eval.c" [25] funcall_recording_as(recorded_as = 6497828, nargs = 6, args = 0xefffbd58), line 3200 in "eval.c" [26] Ffuncall(nargs = 7, args = 0xefffbd58), line 3238 in "eval.c" [27] Fbyte_code(bytestr = 5141300, vector = 5141328, maxdepth = 15), line 416 in "bytecode.c" [28] funcall_lambda(fun = 5141372, nargs = 2, arg_vector = 0xefffc12c), line 3599 in "eval.c" [29] funcall_recording_as(recorded_as = 6091876, nargs = 2, args = 0xefffc128), line 3200 in "eval.c" [30] Ffuncall(nargs = 3, args = 0xefffc128), line 3238 in "eval.c" [31] Fbyte_code(bytestr = 5142472, vector = 5142504, maxdepth = 7), line 416 in "bytecode.c" [32] funcall_lambda(fun = 5142540, nargs = 1, arg_vector = 0xefffc6c0), line 3599 in "eval.c" [33] funcall_recording_as(recorded_as = 6468792, nargs = 1, args = 0xefffc6bc), line 3200 in "eval.c" [34] Ffuncall(nargs = 2, args = 0xefffc6bc), line 3238 in "eval.c" [35] Fbyte_code(bytestr = 5519576, vector = 5519724, maxdepth = 15), line 416 in "bytecode.c" [36] funcall_lambda(fun = 5519792, nargs = 6, arg_vector = 0xefffcb08), line 3599 in "eval.c" [37] funcall_recording_as(recorded_as = 6963172, nargs = 6, args = 0xefffcb04), line 3200 in "eval.c" [38] Ffuncall(nargs = 7, args = 0xefffcb04), line 3238 in "eval.c" [39] Fbyte_code(bytestr = 5647640, vector = 5647704, maxdepth = 19), line 416 in "bytecode.c" [40] funcall_lambda(fun = 5647956, nargs = 1, arg_vector = 0xefffcea4), line 3599 in "eval.c" [41] funcall_recording_as(recorded_as = 5647956, nargs = 1, args = 0xefffcea0), line 3200 in "eval.c" [42] Ffuncall(nargs = 2, args = 0xefffcea0), line 3238 in "eval.c" [43] call1(fn = 5647956, arg0 = 6938868), line 3912 in "eval.c" [44] mapcar1(leni = 17, vals = 0xefffcfb0, fn = 5647956, seq = 6942416), line 3235 in "fns.c" [45] Fmapcar(fn = 5647956, seq = 6942416), line 3285 in "fns.c" [46] funcall_recording_as(recorded_as = 6089884, nargs = 2, args = 0xefffd1c8), line 3197 in "eval.c" [47] Ffuncall(nargs = 3, args = 0xefffd1c8), line 3238 in "eval.c" [48] Fbyte_code(bytestr = 5648020, vector = 5648052, maxdepth = 7), line 416 in "bytecode.c" [49] funcall_lambda(fun = 5648092, nargs = 1, arg_vector = 0xefffd574), line 3599 in "eval.c" [50] funcall_recording_as(recorded_as = 6991172, nargs = 1, args = 0xefffd570), line 3200 in "eval.c" [51] Ffuncall(nargs = 2, args = 0xefffd570), line 3238 in "eval.c" [52] Fbyte_code(bytestr = 5647480, vector = 5647508, maxdepth = 7), line 416 in "bytecode.c" [53] funcall_lambda(fun = 5647544, nargs = 0, arg_vector = 0xefffda8c), line 3599 in "eval.c" [54] funcall_recording_as(recorded_as = 6988508, nargs = 0, args = 0xefffda88), line 3200 in "eval.c" [55] Ffuncall(nargs = 1, args = 0xefffda88), line 3238 in "eval.c" [56] Fbyte_code(bytestr = 5641072, vector = 5641192, maxdepth = 9), line 416 in "bytecode.c" [57] funcall_lambda(fun = 5641372, nargs = 0, arg_vector = 0xefffde68), line 3599 in "eval.c" [58] funcall_recording_as(recorded_as = 6116088, nargs = 0, args = 0xefffde64), line 3200 in "eval.c" [59] Ffuncall(nargs = 1, args = 0xefffde64), line 3238 in "eval.c" [60] call0(fn = 6116088), line 3897 in "eval.c" [61] x_finish_init_device(d = 0x5e8800, props = 5992452), line 595 in "device-x.c" [62] Fmake_device(type = 6096420, connection = 5992452, props = 5992452), line 580 in "device.c" [63] funcall_recording_as(recorded_as = 6075240, nargs = 2, args = 0xefffe0d8), line 3193 in "eval.c" [64] Ffuncall(nargs = 3, args = 0xefffe0d8), line 3238 in "eval.c" [65] Fbyte_code(bytestr = 5094848, vector = 5094872, maxdepth = 7), line 416 in "bytecode.c" [66] funcall_lambda(fun = 5094900, nargs = 1, arg_vector = 0xefffe4f4), line 3599 in "eval.c" [67] funcall_recording_as(recorded_as = 6449800, nargs = 1, args = 0xefffe4f0), line 3200 in "eval.c" [68] Ffuncall(nargs = 2, args = 0xefffe4f0), line 3238 in "eval.c" [69] Fbyte_code(bytestr = 5640508, vector = 5640564, maxdepth = 5), line 416 in "bytecode.c" [70] funcall_lambda(fun = 5640660, nargs = 0, arg_vector = 0xefffe9f4), line 3599 in "eval.c" [71] funcall_recording_as(recorded_as = 6988424, nargs = 0, args = 0xefffe9f0), line 3200 in "eval.c" [72] Ffuncall(nargs = 1, args = 0xefffe9f0), line 3238 in "eval.c" [73] Fbyte_code(bytestr = 5298512, vector = 5298628, maxdepth = 9), line 416 in "bytecode.c" [74] funcall_lambda(fun = 5298848, nargs = 0, arg_vector = 0xeffff01c), line 3599 in "eval.c" [75] funcall_recording_as(recorded_as = 6815296, nargs = 0, args = 0xeffff018), line 3200 in "eval.c" [76] Ffuncall(nargs = 1, args = 0xeffff018), line 3238 in "eval.c" [77] Fbyte_code(bytestr = 5296360, vector = 5296548, maxdepth = 13), line 416 in "bytecode.c" [78] funcall_lambda(fun = 5297088, nargs = 0, arg_vector = 0xeffff278), line 3599 in "eval.c" [79] apply_lambda(fun = 5297088, numargs = 0, unevalled_args = 5992452), line 3501 in "eval.c" [80] Feval(form = 6275124), line 3067 in "eval.c" [81] condition_case_1(handlers = 5992564, bfun = 0x100650 = &Feval(Lisp_Object form), barg = 6275124, hfun = 0xa5710 = &`xemacs`cmdloop.c`cmd_error(Lisp_Object data, Lisp_Object dummy), harg = 5992452), line 1653 in "eval.c" [82] top_level_1(dummy = 5992452), line 206 in "cmdloop.c" [83] internal_catch(tag = 6070780, func = 0xa57f0 = &`xemacs`cmdloop.c`top_level_1(Lisp_Object dummy), arg = 5992452, threw = (nil)), line 1328 in "eval.c" [84] initial_command_loop(load_me = 5992452), line 285 in "cmdloop.c" [85] xemacs_21_0_b38_sparc_sun_solaris2_6(argc = 1, argv = 0xeffff7cc, envp = 0xeffff7d4, restart = 0), line 1673 in "emacs.c" [86] main(argc = 1, argv = 0xeffff7cc, envp = 0xeffff7d4), line 2090 in "emacs.c" (dbx) (dbx) cont signal ILL (illegal opcode) in (unknown) at 0x4b0360 0x004b0360: pure+0x597c: illtrap 0x4 Current function is print_internal 1203 (obj, printcharfun, escapeflag)); (dbx) pobj obj dbx: warning: subscript out of range Unknown Lisp Object type obj = 6067492 (dbx)