Emacs Lockup while XForwarding and running Allegro Common Lisp

[Andrew Myers]

Hi All,
I'm trying to track down a really strange problem with emacs while
XForwarding and running Allegro Common lisp.  I don't know yet if this
is  a problem with emacs, X, or Allegro Lisp but I thought I would
post here and see if anyone had ideas.

Here's the situation,
Mac Laptops running either Leopard or Snow Leopard log into Linux
servers and set up X forwarding (either via ssh -Xy login or telnet
and then setting the DISPLAY variable to a remote machine).
Run emacs so that it comes up on the local Mac desktop, either using
the default X11.app or XQuartz
Start Allegro Common Lisp by running fi:common-lisp

Here's where things get strange:
If I :
Open emacs
Start lisp
Type in "(+ 4 5)"
Press Return twice //This runs the command (+ 4 5) and adds a newline
after the command

Everything will work properly, but emacs will lock up if I
A) Only hit Return once to activate the command, or
B) Only hit Return a bunch of times without typing in some kind of
lisp
command.

I've tried this with both emacs 21 and 23 and see the same thing.  If
I log into a Mac or Solaris machine everything works fine.  I have the
source for emacs 23 and have gotten a backtrace from after emacs locks
up, does it give anyone ideas on where I should go next?

Thanks,
Andrew Myers
STScI

Thread 1 (process 17594):
#0  0x000000316e4cd1c3 in __select_nocancel () from /lib64/libc.so.6
#1  0x0000000000631ace in select_wrapper (n=7, rfd=0x7fffffff93d0,
wfd=0x0, xfd=0x0, tmo=0x7fffffff9330)
    at process.c:4582
#2  0x0000000000632b11 in wait_reading_process_output (time_limit=0,
microsecs=0, read_kbd=0, do_display=0,
    wait_for_cell=12384658, wait_proc=0x2e50850, just_wait_proc=0) at
process.c:4943
#3  0x000000000063121a in Faccept_process_output (process=48564309,
seconds=12384658, millisec=12384658,
    just_this_one=12384658) at process.c:4323
#4  0x00000000005cee8e in Ffuncall (nargs=2, args=0x7fffffff9690) at
eval.c:3034
#5  0x0000000000626023 in Fbyte_code (bytestr=42630353,
vector=44402853, maxdepth=16) at bytecode.c:680
#6  0x00000000005cf6e3 in funcall_lambda (fun=44403157, nargs=1,
arg_vector=0x7fffffff9bc8) at eval.c:3211
#7  0x00000000005cf0e7 in Ffuncall (nargs=2, args=0x7fffffff9bc0) at
eval.c:3070
#8  0x0000000000626023 in Fbyte_code (bytestr=42625457,
vector=44401253, maxdepth=28) at bytecode.c:680
#9  0x00000000005cf6e3 in funcall_lambda (fun=44401557, nargs=3,
arg_vector=0x7fffffffa118) at eval.c:3211
#10 0x00000000005cf0e7 in Ffuncall (nargs=4, args=0x7fffffffa110) at
eval.c:3070
#11 0x0000000000626023 in Fbyte_code (bytestr=42585873,
vector=44400837, maxdepth=20) at bytecode.c:680
#12 0x00000000005cf6e3 in funcall_lambda (fun=44401125, nargs=1,
arg_vector=0x7fffffffa658) at eval.c:3211
#13 0x00000000005cf0e7 in Ffuncall (nargs=2, args=0x7fffffffa650) at
eval.c:3070
#14 0x0000000000626023 in Fbyte_code (bytestr=44483617,
vector=46044309, maxdepth=12) at bytecode.c:680
#15 0x00000000005cf6e3 in funcall_lambda (fun=46060437, nargs=0,
arg_vector=0x7fffffffab88) at eval.c:3211
#16 0x00000000005cf0e7 in Ffuncall (nargs=1, args=0x7fffffffab80) at
eval.c:3070
#17 0x0000000000626023 in Fbyte_code (bytestr=44485537,
vector=46030325, maxdepth=8) at bytecode.c:680
#18 0x00000000005cf6e3 in funcall_lambda (fun=46085717, nargs=0,
arg_vector=0x7fffffffb0a8) at eval.c:3211
#19 0x00000000005cf0e7 in Ffuncall (nargs=1, args=0x7fffffffb0a0) at
eval.c:3070
#20 0x0000000000626023 in Fbyte_code (bytestr=44485153,
vector=46132821, maxdepth=8) at bytecode.c:680
#21 0x00000000005cf6e3 in funcall_lambda (fun=46136933, nargs=0,
arg_vector=0x7fffffffb500) at eval.c:3211
#22 0x00000000005cf35e in apply_lambda (fun=46136933, args=12384658,
eval_flag=1) at eval.c:3135
#23 0x00000000005cdd42 in Feval (form=46101078) at eval.c:2388
#24 0x00000000005cc266 in internal_condition_case_1 (bfun=0x5cd59b
<Feval>, arg=46101078, handlers=12451874,
    hfun=0x533483 <menu_item_eval_property_1>) at eval.c:1538
#25 0x0000000000533528 in menu_item_eval_property (sexpr=46101078) at
keyboard.c:7929
#26 0x0000000000533c3c in parse_menu_item (item=12384658, inmenubar=0)
at keyboard.c:8107
#27 0x000000000046fd91 in single_menu_item (key=46391282,
item=51128918, dummy=12384658, skp_v=0x7fffffffbbe0)
    at menu.c:346
#28 0x000000000053ee0a in map_keymap_item (fun=0x46fd56
<single_menu_item>, args=12384658, key=46391282,
    val=51128918, data=0x7fffffffbbe0) at keymap.c:649
#29 0x000000000053ef9c in map_keymap_internal (map=43326838,
fun=0x46fd56 <single_menu_item>, args=12384658,
    data=0x7fffffffbbe0) at keymap.c:687
#30 0x000000000053f1eb in map_keymap_canonical (map=43326838,
fun=0x46fd56 <single_menu_item>, args=12384658,
    data=0x7fffffffbbe0) at keymap.c:756
#31 0x000000000046fcd5 in single_keymap_panes (keymap=51324406,
pane_name=12384658, prefix=46368338,
    maxdepth=9) at menu.c:310
#32 0x000000000046fef4 in single_menu_item (key=46368338,
item=51324742, dummy=12384658, skp_v=0x7fffffffbe80)
    at menu.c:449
#33 0x000000000053ee0a in map_keymap_item (fun=0x46fd56
<single_menu_item>, args=12384658, key=46368338,
    val=51324742, data=0x7fffffffbe80) at keymap.c:649
#34 0x000000000053ef9c in map_keymap_internal (map=43425446,
fun=0x46fd56 <single_menu_item>, args=12384658,
    data=0x7fffffffbe80) at keymap.c:687
#35 0x000000000053f1eb in map_keymap_canonical (map=43425446,
fun=0x46fd56 <single_menu_item>, args=12384658,
    data=0x7fffffffbe80) at keymap.c:756
#36 0x000000000046fcd5 in single_keymap_panes (keymap=51324342,
pane_name=43966881, prefix=46368146,
    maxdepth=10) at menu.c:310
#37 0x0000000000470499 in parse_single_submenu (item_key=46368146,
item_name=43966881, maps=12384658)
    at menu.c:571
#38 0x0000000000473225 in set_frame_menubar (f=0x114b410,
first_time=0, deep_p=1) at xmenu.c:1080
#39 0x00000000004728cd in x_activate_menubar (f=0x114b410) at xmenu.c:
684
#40 0x000000000052cc44 in kbd_buffer_get_event (kbp=0x7fffffffcdd8,
used_mouse_menu=0x7fffffffd4c4,
    end_time=0x0) at keyboard.c:4246
#41 0x000000000052a4ae in read_char (commandflag=1, nmaps=5,
maps=0x7fffffffd140, prev_event=12384658,
---Type <return> to continue, or q <return> to quit---
    used_mouse_menu=0x7fffffffd4c4, end_time=0x0) at keyboard.c:3079
#42 0x000000000053672d in read_key_sequence (keybuf=0x7fffffffd870,
bufsize=30, prompt=12384658,
    dont_downcase_last=0, can_return_switch_frame=1,
fix_current_buffer=1) at keyboard.c:9512
#43 0x0000000000526689 in command_loop_1 () at keyboard.c:1643
#44 0x00000000005cc0ca in internal_condition_case (bfun=0x5262f6
<command_loop_1>, handlers=12451874,
    hfun=0x525c54 <cmd_error>) at eval.c:1490
#45 0x0000000000526015 in command_loop_2 () at keyboard.c:1360
#46 0x00000000005cba7c in internal_catch (tag=12444690, func=0x525ffb
<command_loop_2>, arg=12384658)
    at eval.c:1226
#47 0x0000000000525fd5 in command_loop () at keyboard.c:1339
#48 0x000000000052579a in recursive_edit_1 () at keyboard.c:954
#49 0x000000000052593d in Frecursive_edit () at keyboard.c:1016
#50 0x0000000000523d9f in main (argc=1, argv=0x7fffffffe1b8) at
emacs.c:1833

Lisp Backtrace:
"accept-process-output" (0xffff9698)
"fi::wait-for-reply-to-come-back" (0xffff9bc8)
"lep::eval-session-in-lisp" (0xffffa118)
"fi:eval-in-lisp" (0xffffa658)
"fi::connection-open-composer-loaded" (0xffffab88)
"fi::connection-open-composer-loaded-cached" (0xffffb0a8)
"fi::connection-open-composer-loaded-and-stopped" (0xffffb500)

The backtrace for the inferior Lisp process (not terrible helpful due
to the proprietary binary)
(gdb) thread apply all bt

Thread 1 (Thread 0x2aaaaaabf450 (LWP 23269)):
#0  0x000000316e4cd1c3 in __select_nocancel () from /lib64/libc.so.6
#1  0x00002aaaaaae2b5a in c_mpwaitsigio (flag=2793) at c/cprocess.c:
246
#2  0x00002aaaaab43d19 in mpwaitsigio () from /grp/software/Linux/
rhAll/acl8264/libacli8218.so
#3  0x00007ffffffe1640 in ?? ()
#4  0x0000000000000006 in ?? ()
#5  0x00002b9e8d2234ff in ?? ()
#6  0x00007ffffffe152b in ?? ()
#7  0x00000000000001d0 in ?? ()
#8  0x00007ffffffe1440 in ?? ()
#9  0x00007ffffffe3d80 in ?? ()
#10 0x000000100004ea92 in ?? ()
#11 0x00007ffffffe1618 in ?? ()
#12 0x00002b9e8d22360c in ?? ()
#13 0x0000001000961871 in ?? ()
#14 0x00000000000001d0 in ?? ()
#15 0x00007ffffffe3d80 in ?? ()
#16 0x0000000000000000 in ?? ()