GNU bug report logs - #75477
31.0.50; scratch/igc: crash on the latest commit

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ihor Radchenko <yantar92 <at> posteo.net>
Subject: bug#75477: closed (Re: bug#75477: 31.0.50; scratch/igc: crash on
 the latest commit)
Date: Fri, 21 Feb 2025 18:06:03 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#75477: 31.0.50; scratch/igc: crash on the latest commit

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 75477 <at> debbugs.gnu.org.

-- 
75477: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=75477
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Pip Cet <pipcet <at> protonmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Ihor Radchenko <yantar92 <at> posteo.net>, 75477-done <at> debbugs.gnu.org
Subject: Re: bug#75477: 31.0.50; scratch/igc: crash on the latest commit
Date: Fri, 21 Feb 2025 18:05:08 +0000

"Eli Zaretskii" <eliz <at> gnu.org> writes:

>> Cc: 75477 <at> debbugs.gnu.org
>> From: Ihor Radchenko <yantar92 <at> posteo.net>
>> Date: Thu, 30 Jan 2025 19:48:08 +0000
>>
>> Pip Cet <pipcet <at> protonmail.com> writes:
>>
>> > Not trying to stop you or anything, but we would like to know more about
>> > what is causing those slowdowns.  If you're too frustrated now, you can
>> > save a coredump (gdb command gcore) and save it along with the emacs
>> > binary and emacs.pdmp somewhere :-)
>> >
>> > Just if you want to, that is.
>>
>> I got an impression that the priority for now is getting rid of the
>> crashes and other critical problems. If I am wrong, I can happily start
>> reporting about performance problems.
>
> Please do.  We are interested in fixing all kinds of problems with
> this branch.

I'm closing this bug because the problems described appear to have been
fixed or warrant new bug numbers.

Pip

[Message part 3 (message/rfc822, inline)]

From: Ihor Radchenko <yantar92 <at> posteo.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; scratch/igc: crash on the latest commit
Date: Fri, 10 Jan 2025 13:39:35 +0000

While waiting to see if bug#75292 has been fixed on the latest
scratch/igc. Is experiences Emacs hanging and even crashing when
creating a new frame.

I have managed to capture a backtrace today:

Thread 1 "emacs" hit Breakpoint 1, terminate_due_to_signal (sig=sig <at> entry=11, backtrace_limit=backtrace_limit <at> entry=40) at emacs.c:432
432	{
(gdb) bt
#0  terminate_due_to_signal (sig=sig <at> entry=11, backtrace_limit=backtrace_limit <at> entry=40) at emacs.c:432
#1  0x00005555556efeb5 in handle_fatal_signal (sig=sig <at> entry=11) at sysdep.c:1799
#2  0x00005555556eff22 in deliver_thread_signal (sig=11, handler=0x5555556efea3 <handle_fatal_signal>) at sysdep.c:1791
#3  deliver_fatal_thread_signal (sig=sig <at> entry=11) at sysdep.c:1811
#4  0x00005555556eff52 in handle_sigsegv (sig=11, siginfo=<optimized out>, arg=<optimized out>) at sysdep.c:1949
#5  0x00007ffff2c41100 in <signal handler called> () at /lib64/libc.so.6
#6  0x00007ffff2c412db in kill () at /lib64/libc.so.6
#7  0x0000555555893629 in sigHandle (sig=<optimized out>, info=<optimized out>, uap=<optimized out>) at /home/yantar92/Dist/mps/code/protsgix.c:114
#8  0x00007ffff2c41100 in <signal handler called> () at /lib64/libc.so.6
#9  scan_ambig (ss=0x7fffffffa6c8, start=<optimized out>, end=0x555596d238f0, closure=<optimized out>) at igc.c:1552
#10 0x0000555555888a98 in RootScan (ss=ss <at> entry=0x7fffffffa6c0, root=root <at> entry=0x7fff4d514550) at /home/yantar92/Dist/mps/code/root.c:540
#11 0x0000555555889315 in traceScanRootRes (ts=ts <at> entry=1, rank=rank <at> entry=0, arena=arena <at> entry=0x7ffff7fbe000, root=root <at> entry=0x7fff4d514550) at /home/yantar92/Dist/mps/code/trace.c:528
#12 0x0000555555889a31 in traceScanRoot (root=0x7fff4d514550, arena=0x7ffff7fbe000, rank=0, ts=<optimized out>) at /home/yantar92/Dist/mps/code/trace.c:545
#13 rootFlip (p=<synthetic pointer>, root=0x7fff4d514550) at /home/yantar92/Dist/mps/code/trace.c:580
#14 RootsIterate (p=<synthetic pointer>, f=<optimized out>, arena=0x7ffff7fbe008) at /home/yantar92/Dist/mps/code/root.c:665
#15 traceFlip (trace=0x7ffff7fbeaa8) at /home/yantar92/Dist/mps/code/trace.c:652
#16 TraceStart (trace=trace <at> entry=0x7ffff7fbeaa8, mortality=<optimized out>, finishingTime=<optimized out>) at /home/yantar92/Dist/mps/code/trace.c:1694
#17 0x000055555588a76f in PolicyStartTrace (traceReturn=traceReturn <at> entry=0x7fffffffa880, collectWorldReturn=collectWorldReturn <at> entry=0x7fffffffa8dc, arena=arena <at> entry=0x7ffff7fbe000, collectWorldAllowed=collectWorldAllowed <at> entry=1)
    at /home/yantar92/Dist/mps/code/policy.c:335
#18 0x000055555588cff2 in TracePoll (workReturn=workReturn <at> entry=0x7fffffffa8e0, collectWorldReturn=collectWorldReturn <at> entry=0x7fffffffa8dc, globals=globals <at> entry=0x7ffff7fbe008, collectWorldAllowed=1) at /home/yantar92/Dist/mps/code/trace.c:1840
#19 0x000055555588d19b in ArenaPoll (globals=globals <at> entry=0x7ffff7fbe008) at /home/yantar92/Dist/mps/code/global.c:745
#20 0x000055555588d58a in mps_ap_fill (p_o=p_o <at> entry=0x7fffffffaa50, mps_ap=mps_ap <at> entry=0x7fffe8001a40, size=size <at> entry=48) at /home/yantar92/Dist/mps/code/mpsi.c:1097
#21 0x00005555557de1a8 in alloc_impl (size=48, type=IGC_OBJ_STRING_DATA, ap=0x7fffe8001a40) at igc.c:3940
#22 0x00005555557de2cc in alloc (size=size <at> entry=44, type=type <at> entry=IGC_OBJ_STRING_DATA) at igc.c:3968
#23 0x00005555557e0d8c in alloc_string_data (nbytes=35, clear=false) at igc.c:4021
#24 igc_make_string (nchars=35, nbytes=35, unibyte=unibyte <at> entry=false, clear=clear <at> entry=false) at igc.c:4085
#25 0x00005555557e0dbc in igc_make_multibyte_string (nchars=<optimized out>, nbytes=<optimized out>, clear=clear <at> entry=false) at igc.c:4092
#26 0x0000555555735002 in make_clear_multibyte_string (nchars=nchars <at> entry=35, nbytes=nbytes <at> entry=35, clearit=clearit <at> entry=false) at alloc.c:2669
#27 0x0000555555735021 in make_clear_string (length=length <at> entry=35, clearit=clearit <at> entry=false) at alloc.c:2641
#28 0x0000555555735917 in make_uninit_string (length=length <at> entry=35) at alloc.c:2652
#29 0x00005555557649ec in concat_to_string (nargs=2, args=0x7fffffffabf8) at fns.c:938
#30 0x0000555555764e46 in Fconcat (nargs=<optimized out>, args=<optimized out>) at fns.c:750
#31 0x00007fffdfe7529b in F7365742d666163652d6174747269627574652d66726f6d2d7265736f75726365_set_face_attribute_from_resource_0 () at /home/yantar92/Git/emacs/src/../native-lisp/31.0.50-fc0e2b3f/preloaded/faces-b9447c93-66d43d26.eln
#32 0x0000555555759184 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=5, args=args <at> entry=0x7fffffffad68) at eval.c:3184
#33 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=5, args=args <at> entry=0x7fffffffad68) at /home/yantar92/Git/emacs/src/lisp.h:2332
#34 0x0000555555757318 in Ffuncall (nargs=6, args=0x7fffffffad60) at eval.c:3108
#35 0x00007fffdfe75502 in F7365742d666163652d617474726962757465732d66726f6d2d7265736f7572636573_set_face_attributes_from_resources_0 () at /home/yantar92/Git/emacs/src/../native-lisp/31.0.50-fc0e2b3f/preloaded/faces-b9447c93-66d43d26.eln
#36 0x0000555555759133 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffaed8) at eval.c:3178
#37 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffaed8) at /home/yantar92/Git/emacs/src/lisp.h:2332
#38 0x0000555555757318 in Ffuncall (nargs=3, args=0x7fffffffaed0) at eval.c:3108
#39 0x00007fffdfe757ca in F6d616b652d666163652d782d7265736f757263652d696e7465726e616c_make_face_x_resource_internal_0 () at /home/yantar92/Git/emacs/src/../native-lisp/31.0.50-fc0e2b3f/preloaded/faces-b9447c93-66d43d26.eln
#40 0x0000555555759133 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffb0d8) at eval.c:3178
#41 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffb0d8) at /home/yantar92/Git/emacs/src/lisp.h:2332
#42 0x0000555555757318 in Ffuncall (nargs=3, args=0x7fffffffb0d0) at eval.c:3108
#43 0x00007fffdfe7c57b in F666163652d737065632d726563616c63_face_spec_recalc_0 () at /home/yantar92/Git/emacs/src/../native-lisp/31.0.50-fc0e2b3f/preloaded/faces-b9447c93-66d43d26.eln
#44 0x0000555555759133 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffb438) at eval.c:3178
#45 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffb438) at /home/yantar92/Git/emacs/src/lisp.h:2332
#46 0x0000555555757318 in Ffuncall (nargs=3, args=0x7fffffffb430) at eval.c:3108
#47 0x00007fffdfe7ee73 in F782d6372656174652d6672616d652d776974682d6661636573_x_create_frame_with_faces_0 () at /home/yantar92/Git/emacs/src/../native-lisp/31.0.50-fc0e2b3f/preloaded/faces-b9447c93-66d43d26.eln
#48 0x0000555555759120 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=1, args=args <at> entry=0x7fffdedff0d0) at eval.c:3176
#49 0x00005555557a00af in exec_byte_code (fun=<optimized out>, args_template=<optimized out>, args_template <at> entry=257, nargs=<optimized out>, nargs <at> entry=1, args=<optimized out>, args <at> entry=0x7fffdedff050) at /home/yantar92/Git/emacs/src/lisp.h:2332
#50 0x000055555575ad08 in funcall_lambda (fun=XIL(0x7fff5fa1e9d5), nargs=nargs <at> entry=1, arg_vector=arg_vector <at> entry=0x7fffdedff050) at eval.c:3267
#51 0x000055555575b0bd in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=1, args=args <at> entry=0x7fffdedff050) at eval.c:3059
#52 0x0000555555757318 in Ffuncall (nargs=nargs <at> entry=2, args=args <at> entry=0x7fffdedff048) at eval.c:3108
#53 0x00005555557575fe in Fapply (nargs=2, args=0x7fffdedff048) at eval.c:2737
#54 0x000055555575920e in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffdedff048) at eval.c:3199
#55 0x00005555557a00af in exec_byte_code (fun=<optimized out>, args_template=<optimized out>, args_template <at> entry=128, nargs=<optimized out>, nargs <at> entry=1, args=<optimized out>, args <at> entry=0x7fffffffb9c8) at /home/yantar92/Git/emacs/src/lisp.h:2332
#56 0x000055555575ad08 in funcall_lambda (fun=XIL(0x7fff4ba7330d), nargs=nargs <at> entry=1, arg_vector=arg_vector <at> entry=0x7fffffffb9c8) at eval.c:3267
#57 0x000055555575b0bd in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=1, args=args <at> entry=0x7fffffffb9c8) at eval.c:3059
#58 0x0000555555757318 in Ffuncall (nargs=2, args=0x7fffffffb9c0) at eval.c:3108
#59 0x00007fffdfc12ed6 in F6d616b652d6672616d65_make_frame_0 () at /home/yantar92/Git/emacs/src/../native-lisp/31.0.50-fc0e2b3f/preloaded/frame-b40fc590-5b61451b.eln
#60 0x0000555555759120 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=1, args=args <at> entry=0x7fffffffbb88) at eval.c:3176
#61 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=1, args=args <at> entry=0x7fffffffbb88) at /home/yantar92/Git/emacs/src/lisp.h:2332
#62 0x0000555555757318 in Ffuncall (nargs=2, args=0x7fffffffbb80) at eval.c:3108
#63 0x00007fffdc3878be in F7365727665722d2d6372656174652d6672616d65_server__create_frame_0 () at /home/yantar92/.emacs.d/eln-cache/31.0.50-fc0e2b3f/server-0cc44189-5626429c.eln
#64 0x000055555575914a in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=3, args=args <at> entry=0x7fffffffbdb0) at eval.c:3180
#65 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=3, args=args <at> entry=0x7fffffffbdb0) at /home/yantar92/Git/emacs/src/lisp.h:2332
#66 0x0000555555757318 in Ffuncall (nargs=4, args=0x7fffffffbda8) at eval.c:3108
#67 0x00007fffdc38753d in F7365727665722d6372656174652d77696e646f772d73797374656d2d6672616d65_server_create_window_system_frame_0 () at /home/yantar92/.emacs.d/eln-cache/31.0.50-fc0e2b3f/server-0cc44189-5626429c.eln
#68 0x0000555555759184 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=5, args=args <at> entry=0x7fffffffbfb8) at eval.c:3184
#69 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=5, args=args <at> entry=0x7fffffffbfb8) at /home/yantar92/Git/emacs/src/lisp.h:2332
--Type <RET> for more, q to quit, c to continue without paging--
#70 0x0000555555757318 in Ffuncall (nargs=6, args=0x7fffffffbfb0) at eval.c:3108
#71 0x00007fffdc38988c in F7365727665722d2d70726f636573732d66696c7465722d31_server__process_filter_1_0 () at /home/yantar92/.emacs.d/eln-cache/31.0.50-fc0e2b3f/server-0cc44189-5626429c.eln
#72 0x0000555555759133 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffc148) at eval.c:3178
#73 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffc148) at /home/yantar92/Git/emacs/src/lisp.h:2332
#74 0x0000555555757318 in Ffuncall (nargs=3, args=0x7fffffffc140) at eval.c:3108
#75 0x00007fffdc38809b in F7365727665722d2d70726f636573732d66696c7465722d616c6c2d70656e64696e67_server__process_filter_all_pending_0 () at /home/yantar92/.emacs.d/eln-cache/31.0.50-fc0e2b3f/server-0cc44189-5626429c.eln
#76 0x0000555555759114 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=0, args=args <at> entry=0x7fffffffc290) at eval.c:3174
#77 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=0, args=args <at> entry=0x7fffffffc290) at /home/yantar92/Git/emacs/src/lisp.h:2332
#78 0x0000555555757318 in Ffuncall (nargs=1, args=0x7fffffffc288) at eval.c:3108
#79 0x00007fffdc387f3e in F7365727665722d70726f636573732d66696c746572_server_process_filter_0 () at /home/yantar92/.emacs.d/eln-cache/31.0.50-fc0e2b3f/server-0cc44189-5626429c.eln
#80 0x0000555555759133 in funcall_subr (subr=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffc3c8) at eval.c:3178
#81 0x000055555575b20c in funcall_general (fun=<optimized out>, numargs=numargs <at> entry=2, args=args <at> entry=0x7fffffffc3c8) at /home/yantar92/Git/emacs/src/lisp.h:2332
#82 0x0000555555757318 in Ffuncall (nargs=nargs <at> entry=3, args=args <at> entry=0x7fffffffc3c0) at eval.c:3108
#83 0x000055555575786f in Fapply (nargs=nargs <at> entry=2, args=args <at> entry=0x7fffffffc460) at eval.c:2780
#84 0x000055555575794c in apply1 (fn=<optimized out>, arg=<optimized out>) at eval.c:2996
#85 0x00005555557ac94f in read_process_output_call (fun_and_args=fun_and_args <at> entry=XIL(0x7fff5845b603)) at process.c:6148
#86 0x0000555555755cde in internal_condition_case_1 (bfun=bfun <at> entry=0x5555557ac936 <read_process_output_call>, arg=XIL(0x7fff5845b603), handlers=handlers <at> entry=XIL(0), hfun=hfun <at> entry=0x5555557ac887 <read_process_output_error_handler>) at eval.c:1651
#87 0x00005555557af7a6 in read_and_dispose_of_process_output (p=<optimized out>, chars=<optimized out>, nbytes=3596, coding=<optimized out>) at process.c:6517
#88 read_process_output (proc=proc <at> entry=XIL(0x7fff5845ad15), channel=channel <at> entry=16) at process.c:6285
#89 0x00005555557b79b4 in wait_reading_process_output (time_limit=time_limit <at> entry=0, nsecs=nsecs <at> entry=0, read_kbd=read_kbd <at> entry=-1, do_display=true, wait_for_cell=wait_for_cell <at> entry=XIL(0), wait_proc=wait_proc <at> entry=0x0, just_wait_proc=0) at process.c:5966
#90 0x00005555556deaec in kbd_buffer_get_event (kbp=<synthetic pointer>, used_mouse_menu=0x7fffffffcfeb, end_time=0x0) at keyboard.c:4115
#91 read_event_from_main_queue (end_time=end_time <at> entry=0x0, local_getcjmp=local_getcjmp <at> entry=0x7fffffffccc0, used_mouse_menu=used_mouse_menu <at> entry=0x7fffffffcfeb) at keyboard.c:2336
#92 0x00005555556e175d in read_decoded_event_from_main_queue (end_time=<optimized out>, local_getcjmp=<optimized out>, prev_event=<optimized out>, used_mouse_menu=<optimized out>) at keyboard.c:2399
#93 read_char (commandflag=1, map=map <at> entry=XIL(0x7fff57ea9de3), prev_event=XIL(0), used_mouse_menu=used_mouse_menu <at> entry=0x7fffffffcfeb, end_time=end_time <at> entry=0x0) at keyboard.c:3031
#94 0x00005555556e2ced in read_key_sequence
    (keybuf=keybuf <at> entry=0x7fffffffd140, prompt=prompt <at> entry=XIL(0), dont_downcase_last=dont_downcase_last <at> entry=false, can_return_switch_frame=can_return_switch_frame <at> entry=true, fix_current_buffer=fix_current_buffer <at> entry=true, prevent_redisplay=prevent_redisplay <at> entry=false, disable_text_conversion_p=false) at keyboard.c:10763
#95 0x00005555556e4e77 in command_loop_1 () at keyboard.c:1435
#96 0x0000555555755c66 in internal_condition_case (bfun=bfun <at> entry=0x5555556e4985 <command_loop_1>, handlers=handlers <at> entry=XIL(0xa8), hfun=hfun <at> entry=0x5555556d58f0 <cmd_error>) at eval.c:1627
#97 0x00005555556d0707 in command_loop_2 (handlers=handlers <at> entry=XIL(0xa8)) at keyboard.c:1174
#98 0x0000555555755ba1 in internal_catch (tag=tag <at> entry=XIL(0x153f0), func=func <at> entry=0x5555556d06d7 <command_loop_2>, arg=arg <at> entry=XIL(0xa8)) at eval.c:1306
#99 0x00005555556d06b4 in command_loop () at keyboard.c:1152
#100 0x00005555556d5465 in recursive_edit_1 () at keyboard.c:760
#101 0x00005555556d580b in Frecursive_edit () at keyboard.c:843
#102 0x00005555556cf92b in main (argc=1, argv=0x7fffffffd5d8) at emacs.c:2658

Lisp Backtrace:
"set-face-attribute-from-resource" (0xffffad68)
"set-face-attributes-from-resources" (0xffffaed8)
"make-face-x-resource-internal" (0xffffb0d8)
"face-spec-recalc" (0xffffb438)
"x-create-frame-with-faces" (0xdedff0d0)
0x5fa1e9d0 PVEC_CLOSURE
"apply" (0xdedff048)
"frame-creation-function" (0xffffb9c8)
"make-frame" (0xffffbb88)
"server--create-frame" (0xffffbdb0)
"server-create-window-system-frame" (0xffffbfb8)
"server--process-filter-1" (0xffffc148)
"server--process-filter-all-pending" (0xffffc290)
"server-process-filter" (0xffffc3c8)

In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.42, cairo version 1.18.2) of 2025-01-10 built on localhost
Repository revision: 9f8bebddf3ae90558e7e87e192007c74f7cc9e0b
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101014
System Description: Gentoo Linux

Configured using:
 'configure --with-mps=yes --with-native-compilation 'CFLAGS=-g3
 -I/opt/mps/include -L/opt/mps/lib'
 JAVAC=/etc/java-config-2/current-system-vm/bin/javac
 PKG_CONFIG_PATH=/usr/share/guile-data/3.0/pkgconfig'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG
LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG
SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM
XINPUT2 XPM GTK3 ZLIB

Important settings:
  value of $LANG: en_US.utf8
  locale-coding-system: utf-8-unix

-- 
Ihor Radchenko // yantar92,
Org mode maintainer,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

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Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.