building with -flto -fwhole-program

[Dan Nicolaescu]

Trying to build using the current gcc trunk using -flto -fwhole-program -O0
results in a binary that gives an error at run time:

*** glibc detected *** /home/dann/emacs/objs/src/emacs: corrupted double-linked 
list: 0x086bed00 ***

Breakpoint 3, 0x00447192 in backtrace () from /lib/libc.so.6
(gdb) bt
#0  0x00447192 in backtrace () from /lib/libc.so.6
#1  0x003c8a61 in __libc_message () from /lib/libc.so.6
#2  0x003d18a1 in _int_realloc () from /lib/libc.so.6
#3  0x003d3605 in realloc () from /lib/libc.so.6
#4  0x080e5bf0 in xrealloc (block=0x86becf8, size=0x10) at 
/home/dann/emacs/emacs/src/alloc.c:752
#5  0x080ceddc in regex_compile (pattern=0x837a7b0 "/#[^/]+#\\'", size=0xa, 
syntax=0x340204, bufp=0x8391260)
    at /home/dann/emacs/emacs/src/regex.c:2907
#6  0x080cd7f2 in re_compile_pattern (pattern=0x837a7b0 "/#[^/]+#\\'", 
length=0xa, bufp=0x8391260)
    at /home/dann/emacs/emacs/src/regex.c:6413
#7  0x0804f85a in compile_pattern_1 (cp=0x8391250, pattern=0x8211dd1, 
translate=0x83d40aa, regp=0x838fa80, posix=0x0)
    at /home/dann/emacs/emacs/src/search.c:163
#8  0x0804f6b4 in compile_pattern (pattern=0x8211dd1, regp=0x838fa80, 
translate=0x83d40aa, posix=0x0, multibyte=0x0)
    at /home/dann/emacs/emacs/src/search.c:258
#9  0x0815d5c5 in string_match_1 (regexp=0x8211dd1, string=0x8431eb9, 
start=0x83d40aa, posix=0x0)
    at /home/dann/emacs/emacs/src/search.c:414
#10 0x0815d41e in Fstring_match (regexp=0x8211dd1, string=0x8431eb9, 
start=0x83d40aa)
    at /home/dann/emacs/emacs/src/search.c:464
#11 0x080e72f2 in Ffuncall (nargs=0x3, args=0xbffe88f0) at 
/home/dann/emacs/emacs/src/eval.c:2996
#12 0x081360c7 in Fbyte_code (bytestr=0x82120c9, vector=0x82120dd, 
maxdepth=0x10)
    at /home/dann/emacs/emacs/src/bytecode.c:679
#13 0x080e78df in funcall_lambda (fun=0x82120a5, nargs=0x1, 
arg_vector=0xbffe8ba4)
    at /home/dann/emacs/emacs/src/eval.c:3174
#14 0x080e74c7 in Ffuncall (nargs=0x2, args=0xbffe8ba0) at 
/home/dann/emacs/emacs/src/eval.c:3036
#15 0x081360c7 in Fbyte_code (bytestr=0x8212241, vector=0x8212255, 
maxdepth=0x18)
    at /home/dann/emacs/emacs/src/bytecode.c:679
#16 0x080e78df in funcall_lambda (fun=0x8212215, nargs=0x2, 
arg_vector=0xbffe8e64)
    at /home/dann/emacs/emacs/src/eval.c:3174
#17 0x080e74c7 in Ffuncall (nargs=0x3, args=0xbffe8e60) at 
/home/dann/emacs/emacs/src/eval.c:3036
#18 0x081360c7 in Fbyte_code (bytestr=0x82124b9, vector=0x82124cd, 
maxdepth=0x10)
    at /home/dann/emacs/emacs/src/bytecode.c:679
#19 0x080e78df in funcall_lambda (fun=0x821249d, nargs=0x2, 
arg_vector=0xbffe9124)
    at /home/dann/emacs/emacs/src/eval.c:3174
#20 0x080e74c7 in Ffuncall (nargs=0x3, args=0xbffe9120) at 
/home/dann/emacs/emacs/src/eval.c:3036
#21 0x080e6cee in call2 (fn=0x8438682, arg1=0x8431eb9, arg2=0x6dc) at 
/home/dann/emacs/emacs/src/eval.c:2804
#22 0x0806257d in Finsert_file_contents (filename=0x8431eb9, visit=0x83d40aa, 
beg=0x0, end=0x6dc, replace=0x83d40aa)
    at /home/dann/emacs/emacs/src/fileio.c:4089
#23 0x080e7365 in Ffuncall (nargs=0x2, args=0xbfffd660) at 
/home/dann/emacs/emacs/src/eval.c:3004
#24 0x081360c7 in Fbyte_code (bytestr=0x820f0a9, vector=0x820f0bd, 
maxdepth=0x18)
    at /home/dann/emacs/emacs/src/bytecode.c:679
#25 0x080e78df in funcall_lambda (fun=0x820f065, nargs=0x4, 
arg_vector=0xbfffd93c)
    at /home/dann/emacs/emacs/src/eval.c:3174
#26 0x080e74c7 in Ffuncall (nargs=0x5, args=0xbfffd938) at 
/home/dann/emacs/emacs/src/eval.c:3036
#27 0x080e6e4f in call4 (fn=0x8421502, arg1=0x8431f09, arg2=0x8431f09, 
arg3=0x83d40c2, arg4=0x83d40c2)
    at /home/dann/emacs/emacs/src/eval.c:2838
#28 0x080fa0ea in Fload (file=0x8431f19, noerror=0x83d40c2, 
nomessage=0x83d40c2, nosuffix=0x83d40c2, must_suffix=0x83d40aa)
    at /home/dann/emacs/emacs/src/lread.c:1177
#29 0x080e7365 in Ffuncall (nargs=0x5, args=0xbfffdbb0) at 
/home/dann/emacs/emacs/src/eval.c:3004
#30 0x081360c7 in Fbyte_code (bytestr=0x82367c1, vector=0x82367d5, 
maxdepth=0x18)
     at /home/dann/emacs/emacs/src/bytecode.c:679
#31 0x080e78df in funcall_lambda (fun=0x82367ad, nargs=0x0, 
arg_vector=0xbfffddd0)
    at /home/dann/emacs/emacs/src/eval.c:3174
#32 0x0813a03e in apply_lambda (fun=0x82367ad, args=0x83d40aa, eval_flag=0x1)
    at /home/dann/emacs/emacs/src/eval.c:3100
#33 0x08138c25 in Feval (form=0x8450236) at 
/home/dann/emacs/emacs/src/eval.c:2394
#34 0x0813543b in top_level_2 () at /home/dann/emacs/emacs/src/keyboard.c:1330
#35 0x0810a8a3 in internal_condition_case (bfun=0x8135428 <top_level_2>, 
handlers=0x83db93a, hfun=0x805d8eb <cmd_error>)
    at /home/dann/emacs/emacs/src/eval.c:1460
#36 0x0805d8b9 in top_level_1 (ignore=0x83d40aa) at 
/home/dann/emacs/emacs/src/keyboard.c:1338
#37 0x0810a73a in internal_catch (tag=0x83db19a, func=0x805d887 <top_level_1>, 
arg=0x83d40aa)
    at /home/dann/emacs/emacs/src/eval.c:1204
#38 0x080e8e15 in command_loop () at /home/dann/emacs/emacs/src/keyboard.c:1293
#39 0x080e8d54 in recursive_edit_1 () at 
/home/dann/emacs/emacs/src/keyboard.c:923
#40 0x08170110 in Frecursive_edit () at 
/home/dann/emacs/emacs/src/keyboard.c:985
#41 0x0805efb8 in main (argc=0x5, argv=0xbfffe644) at 
/home/dann/emacs/emacs/src/emacs.c:1722

Lisp Backtrace:
"string-match" (0xbffe88f4)
"auto-coding-alist-lookup" (0xbffe8ba4)
"find-auto-coding" (0xbffe8e64)
"set-auto-coding" (0xbffe9124)
"insert-file-contents" (0xbfffd664)
"load-with-code-conversion" (0xbfffd93c)
"load" (0xbfffdbb4)
"normal-top-level" (0xbfffddd0)

This might be a bug in the compiler, or maybe something in emacs breaks when 
using -fwhole-program...
Ideas how to go about this?