Infinite loop displaying article in Gnus

In XEmacs 21.2 (beta37) "Pan" [Lucid] (i586-pc-win32) of Wed Nov 15 2000 on SLOTH configured using `configure UNKNOWN' Sometimes when for the first time opening a message after Gnus startup, XEmacs seems to go into infinite loop consuming 100% CPU. Any ideas? Gleb XEMACS! memchr + 5 bytes bi_scan_buffer(buffer * 0x024bc200, int 10, long 177, long 16354, long 2147483644, long * 0x0082a530, int 0) line 608 + 33 bytes scan_buffer(buffer * 0x024bc200, int 10, long 1, long 16354, long 2147483647, long * 0x0082a530, int 0) line 697 + 33 bytes buffer_line_number(buffer * 0x024bc200, long 16354, int 0) line 297 + 47 bytes window_line_number(window * 0x023c7c00, int 2) line 6646 + 15 bytes decode_mode_spec(window * 0x023c7c00, int 108, int 2) line 6721 + 13 bytes generate_fstring_runes(window * 0x023c7c00, position_redisplay_data_type * 0x0082a870, long 61, long 60, long -1, long 29515220, int 3, int 657, unsigned int 1, int 2, long * 0x0082a864, long 28360708) line 3874 + 17 bytes generate_fstring_runes(window * 0x023c7c00, position_redisplay_data_type * 0x0082a870, long 60, long 0, long -1, long 37758360, int 1, int 657, unsigned int 1, int 2, long * 0x0082a864, long 28360708) line 4056 + 65 bytes generate_formatted_string_db(long 37758228, long 36476276, window * 0x023c7c00, display_line * 0x024b5000, display_block * 0x01b5be00, unsigned int 1, int 2, int 659, int 2) line 3507 + 54 bytes generate_modeline(window * 0x023c7c00, display_line * 0x024b5000, int 2) line 3669 + 51 bytes ensure_modeline_generated(window * 0x023c7c00, int 2) line 4211 + 19 bytes real_current_modeline_height(window * 0x023c7c00) line 4224 + 11 bytes window_modeline_height(window * 0x023c7c00) line 930 + 9 bytes window_bottom_window_gutter_height(window * 0x023c7c00) line 1046 + 9 bytes window_bottom_gutter_height(window * 0x023c7c00) line 1059 + 9 bytes start_end_of_last_line(window * 0x023c7c00, long 1, int 1, int 1) line 7551 + 21 bytes end_of_last_line_may_error(window * 0x023c7c00, long 1) line 7646 + 17 bytes pixel_to_glyph_translation(frame * 0x01d1a000, int 239, int 355, int * 0x0082ad30, int * 0x0082ad24, int * 0x0082ad14, int * 0x0082ad18, window * * 0x0082ad34, long * 0x0082ad38, long * 0x0082ad10, long * 0x0082ad28, long * 0x0082ad2c, long * 0x0082ad20) line 8779 + 29 bytes event_pixel_translation(long 37521852, int * 0x00000000, int * 0x00000000, int * 0x00000000, int * 0x00000000, window * * 0x0082ad7c, long * 0x00000000, long * 0x00000000, long * 0x00000000, long * 0x00000000, long * 0x00000000) line 1825 + 66 bytes Fevent_window(long 37521852) line 1955 + 31 bytes Ffuncall(int 2, long * 0x0082ae0c) line 3528 + 66 bytes execute_optimized_program(const unsigned char * 0x01b57c10, int 5, long * 0x01ca2c10) line 746 + 16 bytes funcall_compiled_function(long 30230728, int 1, long * 0x0082b0f8) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082b0f4) line 3563 + 17 bytes call1(long 30217948, long 37521852) line 4183 + 11 bytes execute_internal_event(long 37521852) line 2938 + 16 bytes Faccept_process_output(long 39214592, long 28360708, long 28360708) line 2637 + 9 bytes Ffuncall(int 2, long * 0x0082b210) line 3528 + 127 bytes execute_optimized_program(const unsigned char * 0x0082b40c, int 10, long * 0x01c04610) line 746 + 16 bytes Fbyte_code(long 29310228, long 29378048, long 21) line 2405 + 38 bytes Feval(long 29385800) line 3331 + 187 bytes internal_catch(long 29248764, long (long)* 0x01070ea7 Feval(long), long 29385800, int * volatile 0x00000000) line 1317 + 7 bytes execute_rare_opcode(long * 0x0082b71c, const unsigned char * 0x01da01a8, int 141) line 1252 + 22 bytes execute_optimized_program(const unsigned char * 0x01da0110, int 9, long * 0x01be7910) line 656 + 17 bytes funcall_compiled_function(long 29246144, int 6, long * 0x0082ba08) line 518 + 53 bytes Ffuncall(int 7, long * 0x0082ba04) line 3563 + 17 bytes Fapply(int 6, long * 0x0082bafc) line 3804 + 13 bytes Ffuncall(int 7, long * 0x0082baf8) line 3549 + 14 bytes execute_optimized_program(const unsigned char * 0x01d28090, int 7, long * 0x01cd2890) line 746 + 16 bytes funcall_compiled_function(long 30440856, int 6, long * 0x0082bddc) line 518 + 53 bytes Ffuncall(int 7, long * 0x0082bdd8) line 3563 + 17 bytes Fapply(int 6, long * 0x0082bed0) line 3804 + 13 bytes Ffuncall(int 7, long * 0x0082becc) line 3549 + 14 bytes execute_optimized_program(const unsigned char * 0x025ad4d0, int 7, long * 0x01fa3b90) line 746 + 16 bytes funcall_compiled_function(long 33442804, int 3, long * 0x0082c1b4) line 518 + 53 bytes Ffuncall(int 4, long * 0x0082c1b0) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x024b3350, int 4, long * 0x01ffd310) line 746 + 16 bytes funcall_compiled_function(long 33578028, int 2, long * 0x0082c48c) line 518 + 53 bytes Ffuncall(int 3, long * 0x0082c488) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02565f90, int 5, long * 0x01ffc790) line 746 + 16 bytes funcall_compiled_function(long 33577496, int 1, long * 0x0082c768) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082c764) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02565490, int 6, long * 0x01ffc710) line 746 + 16 bytes funcall_compiled_function(long 33577524, int 0, long * 0x0082ca48) line 518 + 53 bytes Ffuncall(int 1, long * 0x0082ca44) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02341b70, int 1, long * 0x01ff4370) line 746 + 16 bytes funcall_compiled_function(long 33577356, int 0, long * 0x0082cd14) line 518 + 53 bytes Ffuncall(int 1, long * 0x0082cd10) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02341af0, int 2, long * 0x01ff4410) line 746 + 16 bytes funcall_compiled_function(long 33577048, int 0, long * 0x0082d0e8) line 518 + 53 bytes Ffuncall(int 1, long * 0x0082d0e4) line 3563 + 17 bytes run_hook_with_args_in_buffer(buffer * 0x024d4400, int 1, long * 0x0082d0e4, int 0) line 4020 + 13 bytes run_hook_with_args(int 1, long * 0x0082d0e4, int 0) line 4033 + 23 bytes Frun_hooks(int 1, long * 0x0082d0e4) line 3887 + 19 bytes Ffuncall(int 2, long * 0x0082d0e0) line 3549 + 14 bytes execute_optimized_program(const unsigned char * 0x025b5210, int 5, long * 0x01c6d810) line 746 + 16 bytes funcall_compiled_function(long 29841944, int 2, long * 0x0082d3c0) line 518 + 53 bytes Ffuncall(int 3, long * 0x0082d3bc) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x0082d59c, int 3, long * 0x01c69690) line 746 + 16 bytes Fbyte_code(long 29855364, long 29791872, long 7) line 2405 + 38 bytes Feval(long 29503552) line 3331 + 187 bytes condition_case_1(long 29292432, long (long)* 0x01070ea7 Feval(long), long 29503552, long (long, long)* 0x0106e184 run_condition_case_handlers(long, long), long 28484812) line 1651 + 7 bytes condition_case_3(long 29503552, long 28484812, long 29292432) line 1732 + 27 bytes execute_rare_opcode(long * 0x0082d900, const unsigned char * 0x025b51ec, int 143) line 1271 + 19 bytes execute_optimized_program(const unsigned char * 0x025b5110, int 6, long * 0x01c6d910) line 656 + 17 bytes funcall_compiled_function(long 29841916, int 2, long * 0x0082dbe4) line 518 + 53 bytes Ffuncall(int 3, long * 0x0082dbe0) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x024d4210, int 3, long * 0x0207c610) line 746 + 16 bytes funcall_compiled_function(long 33781732, int 1, long * 0x0082debc) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082deb8) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02515010, int 8, long * 0x0207c810) line 746 + 16 bytes funcall_compiled_function(long 34171836, int 4, long * 0x0082e1a0) line 518 + 53 bytes Ffuncall(int 5, long * 0x0082e19c) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02188410, int 6, long * 0x022bd110) line 746 + 16 bytes funcall_compiled_function(long 36459452, int 1, long * 0x0082e480) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082e47c) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x024b1390, int 4, long * 0x022bd190) line 746 + 16 bytes funcall_compiled_function(long 36459592, int 1, long * 0x0082e758) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082e754) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02188410, int 6, long * 0x022bd110) line 746 + 16 bytes funcall_compiled_function(long 36459452, int 0, long * 0x0082ec14) line 518 + 53 bytes Ffuncall(int 1, long * 0x0082ec10) line 3563 + 17 bytes run_hook_with_args_in_buffer(buffer * 0x024bc200, int 1, long * 0x0082ec10, int 0) line 4020 + 13 bytes run_hook_with_args(int 1, long * 0x0082ec10, int 0) line 4033 + 23 bytes Frun_hooks(int 1, long * 0x0082ec10) line 3887 + 19 bytes Ffuncall(int 2, long * 0x0082ec0c) line 3549 + 14 bytes Fapply(int 2, long * 0x0082ec0c) line 3747 + 13 bytes Ffuncall(int 3, long * 0x0082ec08) line 3549 + 14 bytes execute_optimized_program(const unsigned char * 0x021b88b0, int 3, long * 0x021e4750) line 746 + 16 bytes funcall_compiled_function(long 35554292, int 1, long * 0x0082eee0) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082eedc) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02438050, int 2, long * 0x023f9750) line 746 + 16 bytes funcall_compiled_function(long 37953088, int 0, long * 0x0082f1b0) line 518 + 53 bytes Ffuncall(int 1, long * 0x0082f1ac) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02252810, int 3, long * 0x0233bc10) line 746 + 16 bytes funcall_compiled_function(long 37953060, int 2, long * 0x0082f484) line 518 + 53 bytes Ffuncall(int 3, long * 0x0082f480) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x02188790, int 4, long * 0x02342d90) line 746 + 16 bytes funcall_compiled_function(long 36710404, int 1, long * 0x0082f75c) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082f758) line 3563 + 17 bytes execute_optimized_program(const unsigned char * 0x0249d310, int 5, long * 0x0234bc10) line 746 + 16 bytes funcall_compiled_function(long 36710628, int 1, long * 0x0082fa34) line 518 + 53 bytes Ffuncall(int 2, long * 0x0082fa30) line 3563 + 17 bytes Fcall_interactively(long 35763740, long 28360708, long 28360708) line 940 + 22 bytes Fcommand_execute(long 35763740, long 28360708, long 28360708) line 2970 + 17 bytes execute_command_event(command_builder * 0x01d15c80, long 31426496) line 3833 + 25 bytes Fdispatch_event(long 31426496) line 4124 + 70 bytes Fcommand_loop_1() line 583 + 9 bytes command_loop_1(long 28360708) line 495 condition_case_1(long 28360804, long (long)* 0x01050b66 command_loop_1(long), long 28360708, long (long, long)* 0x01050580 cmd_error(long, long), long 28360708) line 1651 + 7 bytes command_loop_3() line 256 + 35 bytes command_loop_2(long 28360708) line 269 internal_catch(long 28440700, long (long)* 0x010506d0 command_loop_2(long), long 28360708, int * volatile 0x00000000) line 1317 + 7 bytes initial_command_loop(long 28360708) line 305 + 25 bytes STACK_TRACE_EYE_CATCHER(int 1, char * * 0x01b43f30, char * * 0x01d2cf00, int 0) line 2233 main(int 1, char * * 0x01b43f30, char * * 0x01d2cf00) line 2666 XEMACS! mainCRTStartup + 180 bytes _start() line 169