[tree-ssa] Bootstrap failure on i686-linux

[Paul Brook <paul at nowt dot org>]

I've been getting bootstrap failures for tree-ssa branch since about friday 
last week.

xgcc -B/home/paul/cases/gcc-obj/gcc/ -B/home/paul/cases/usr/
athlon-pc-linux-gnu/bin/ -B/home/paul/cases/usr/athlon-pc-linux-gnu/lib/ 
-isystem /home/paul/cases/usr/athlon-pc-linux-gnu/include -isystem /home/
paul/cases/usr/athlon-pc-linux-gnu/sys-include -O2 -DIN_GCC    -W -Wall 
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem ./include  
-I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/config -I../../
gcc/gcc/../include -I../../gcc/gcc/../libbanshee/libcompat -I../../gcc/
gcc/../libbanshee -I../../gcc/gcc/../libbanshee/points-to   -g0 
-finhibit-size-directive -fno-inline-functions -fno-exceptions 
-fno-zero-initialized-in-bss -fno-unit-at-a-time -fno-omit-frame-pointer \
   -c ../../gcc/gcc/crtstuff.c -DCRT_BEGIN \
  -o crtbegin.o
../../gcc/gcc/crtstuff.c: In function `__do_global_dtors_aux':

../../gcc/gcc/crtstuff.c:287: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[2]: *** [crtbegin.o] Error 1
make[2]: Leaving directory `/home/paul/cases/gcc-obj/gcc'
make[1]: *** [stage1_build] Error 2
make[1]: Leaving directory `/home/paul/cases/gcc-obj/gcc'
make: *** [bootstrap] Error 2

Running under gdb gives:

Program received signal SIGSEGV, Segmentation fault.
0x081e4210 in emit_line_note (location=
      {file = 0xbffffaf2 "../../gcc/gcc/crtstuff.c", line = 255})
    at ../../gcc/gcc/emit-rtl.c:4682
4682      if (location.file && last_location.file
(gdb) bt
#0  0x081e4210 in emit_line_note (location=
      {file = 0xbffffaf2 "../../gcc/gcc/crtstuff.c", line = 255})
    at ../../gcc/gcc/emit-rtl.c:4682
#1  0x0826c3a7 in init_function_start (subr=0x403370e0)
    at ../../gcc/gcc/function.c:6362
#2  0x0806cf3c in c_expand_body_1 (fndecl=0x403370e0, nested_p=0)
    at ../../gcc/gcc/c-decl.c:6314
#3  0x0806d7cf in c_expand_body (fndecl=0x403370e0)
    at ../../gcc/gcc/c-decl.c:6480
#4  0x0806cc44 in finish_function (nested=0, can_defer_p=1)
    at ../../gcc/gcc/c-decl.c:6232
#5  0x0804af18 in yyparse () at c-parse.y:385
#6  0x08054ce5 in c_parse_file () at c-parse.y:3015
#7  0x080aa6f0 in c_common_parse_file (set_yydebug=0)
    at ../../gcc/gcc/c-opts.c:1201
#8  0x084153ea in compile_file () at ../../gcc/gcc/toplev.c:1774
#9  0x0841a209 in do_compile () at ../../gcc/gcc/toplev.c:4468
#10 0x0841a2a2 in toplev_main (argc=32, argv=0xbffff734)
    at ../../gcc/gcc/toplev.c:4508
#11 0x080e27fe in main (argc=32, argv=0xbffff734) at ../../gcc/gcc/main.c:35
(gdb) p last_location.file
No symbol "last_location" in current context.
(gdb) p location.file
$2 = 0xbffffaf2 "../../gcc/gcc/crtstuff.c"
(gdb) p cfun
$3 = (struct function *) 0x40257800
(gdb) p cfun.emit
$4 = (struct emit_status *) 0x0

Paul