R14B Illegal instruction?

Mark Scandariato <>
Fri Sep 17 20:43:08 CEST 2010

I just built R14B for Ubuntu 9.04 (gcc version 4.3.3 (Ubuntu
4.3.3-5ubuntu4)) and when I try to enable some async threads, I get an
"Illegal instruction" fault.

Here's a stack trace:

:~/otp_src_R14B$ bin/cerl -debug +A 4
Illegal instruction (core dumped)
:~/otp_src_R14B$ gdb --core=core
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
(no debugging symbols found)
Core was generated by
`/home/erlang/otp_src_R14B/bin/i686-pc-linux-gnu/beam.debug -A 4 -- -root
Program terminated with signal 4, Illegal instruction.
[New process 28563]
[New process 28587]
#0  0x0823d51a in ?? ()
(gdb) file /home/erlang/otp_src_R14B/bin/i686-pc-linux-gnu/beam.debug
Reading symbols from
(gdb) where
#0  ethr_event_reset__ (e=0xb769c030) at
#1  0x0823d723 in ethr_event_reset (e=0xb769c030) at
#2  0x0823cf1c in ethr_thr_create (tid=0xb7580ca4, func=0x81515c6
<async_main>, arg=0xb7580c48, opts=0xbfb85348) at pthread/ethread.c:256
#3  0x080cb160 in erts_thr_create (tid=0xb7580ca4, func=0x81515c6
<async_main>, arg=0xb7580c48, opts=0xbfb85348) at beam/erl_threads.h:348
#4  0x081511bb in init_async (hndl=6) at beam/erl_async.c:143
#5  0x081c62ab in async_drv_start (port_num=1, name=0x825f3fa "async",
opts=0xbfb85400) at sys/unix/sys.c:2375
#6  0x080e48d5 in erts_open_driver (driver=0xb769dbb8, pid=4294967291,
name=0x825f3fa "async", opts=0xbfb85400, error_number_ptr=0x0)
    at beam/io.c:641
#7  0x081c66a5 in sys_init_io () at sys/unix/sys.c:2528
#8  0x080e60d3 in init_io () at beam/io.c:1304
#9  0x0809b41b in erl_init () at beam/erl_init.c:281
#10 0x0809dd25 in erl_start (argc=15, argv=0xbfb85704) at
#11 0x0807f126 in main (argc=4001536, argv=0x0) at sys/unix/erl_main.c:29

I can send a core file if anyone wants it.

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