make bootstrap segfaults

[Eric S. Raymond]

Emacs doesn't build.

Linux kernel 2.6.7-1.494.2.2smp.
Fedora Core 2 distribution.
Emacs CVS head,

Dumping under names emacs and emacs-21.3.50
make[1]: *** [bootstrap-emacs] Segmentation fault
make[1]: Leaving directory `/home/esr/cvs/emacs/src'
make: *** [bootstrap] Error 2

gdb backtrace shows this:

Program received signal SIGSEGV, Segmentation fault.
0x0075cd6c in memcpy () from /lib/tls/libc.so.6
(gdb) bt
#0  0x0075cd6c in memcpy () from /lib/tls/libc.so.6
#1  0x08166202 in unexec (new_name=0x90f20d4 "/home/esr/cvs/emacs/src/emacs",
    old_name=0x90f20f8 "/home/esr/cvs/emacs/src/temacs", data_start=137918216,
    bss_start=0, entry_address=0) at unexelf.c:925
#2  0x080e1629 in Fdump_emacs (filename=152144008, symfile=152143976)
    at emacs.c:2179
#3  0x0813ef04 in Feval (form=135912680) at eval.c:2091
#4  0x0813c8e3 in Fprogn (args=-162016876) at eval.c:408
#5  0x0813c821 in Fif (args=147663685) at eval.c:357
#6  0x0813f04d in Feval (form=137910452) at eval.c:2038
#7  0x0813c800 in Fif (args=147665629) at eval.c:356
#8  0x0813f04d in Feval (form=137910452) at eval.c:2038
#9  0x08153187 in readevalloop (readcharfun=146378857, stream=0x8bbe808,
    sourcename=146529995, evalfun=0x813ebd0 <Feval>, printflag=0,
    unibyte=146298929, readfun=146298929) at lread.c:1376
#10 0x081521d3 in Fload (file=146529995, noerror=146298929,
    nomessage=146298929, nosuffix=137921088, must_suffix=18287366)
    at lread.c:914
#11 0x0813ef46 in Feval (form=137914728) at eval.c:2105
#12 0x080e25a9 in top_level_2 () at keyboard.c:1315
#13 0x0813dda2 in internal_condition_case (bfun=0x80e2598 <top_level_2>,
    handlers=146359857, hfun=0x80e226c <cmd_error>) at eval.c:1346
#14 0x080e25dd in top_level_1 () at keyboard.c:1323
#15 0x0813d931 in internal_catch (tag=137921088, func=0x80e25ac <top_level_1>,
    arg=146298929) at eval.c:1107
#16 0x080e2517 in command_loop () at keyboard.c:1280
#17 0x080e201c in recursive_edit_1 () at keyboard.c:978
#18 0x080e213c in Frecursive_edit () at keyboard.c:1039
#19 0x080e0a2e in main (argc=5, argv=0xfeeec254) at emacs.c:1687

-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>

The most foolish mistake we could possibly make would be to permit 
the conquered Eastern peoples to have arms.  History teaches that all 
conquerors who have allowed their subject races to carry arms have 
prepared their own downfall by doing so.
        -- Adolph Hitler, April 11 1942.