Re: emacs segfault on bootstrap

[Chong Yidong <cyd@stupidchicken.com>]

OK, now I can reproduce this (I had to reinstall gcc-3.4 -- the bug
doesn't show up for gcc4, or for -O2 and below).

I managed to get a backtrace.  A Lisp_Int was passed to print_object,
but, for some reason, print_object is in the Lisp_Vectorlike case
statement instead.

A cursory inspection did not reveal any bugs in print_object.  Smells
like a compiler bug.

Program received signal SIGSEGV, Segmentation fault.
0x0819c3be in print_object (obj=58, printcharfun=137788457, escapeflag=1)
    at print.c:2009
2009          switch (XMISCTYPE (obj))
(gdb) bt
#0  0x0819c3be in print_object (obj=58, printcharfun=137788457, escapeflag=1)
    at print.c:2009
#1  0x0819c4c5 in print_object (obj=137726760, printcharfun=137788457, 
    escapeflag=1) at print.c:1999
#2  0x0819e989 in Fprin1 (object=137726764, printcharfun=137788457)
    at print.c:1295
#3  0x0819eedd in print_error_message (data=142518805, stream=137788457, 
    context=0x2 <Address 0x2 out of bounds>, caller=142518437) at print.c:1097
#4  0x08112a1a in cmd_error_internal (data=142518805, context=0xbfcfffb0 "")
    at keyboard.c:1263
#5  0x08112bae in cmd_error (data=142518805) at keyboard.c:1200
#6  0x081856fc in internal_condition_case (bfun=0x811c420 <command_loop_1>, 
    handlers=137832193, hfun=0x8112ad0 <cmd_error>) at eval.c:1455
#7  0x0810cda6 in command_loop_2 () at keyboard.c:1323
#8  0x0818564a in internal_catch (tag=2, func=0x810cd80 <command_loop_2>, 
    arg=137788409) at eval.c:1211
#9  0x0810cc3d in recursive_edit_1 () at keyboard.c:1302
#10 0x0810cd3c in Frecursive_edit () at keyboard.c:1056
#11 0x0810bff3 in main (argc=3, argv=0xbfd00574) at emacs.c:1789
(gdb) f 1
#1  0x0819c4c5 in print_object (obj=137726760, printcharfun=137788457, 
    escapeflag=1) at print.c:1999
1999                    print_object (tem, printcharfun, escapeflag);
(gdb) p tem
$3 = 2
(gdb) p size
$4 = 10
(gdb) p obj
$5 = 137726760
(gdb) xtype
Lisp_Int
(gdb) xvector
$6 = (struct Lisp_Vector *) 0x8358b28
0
(gdb) p $6->contents[0]
$11 = 58