Re: Preview: portable dumper

[Robert Pluim]

Daniel Colascione <address@hidden> writes:

> On 02/20/2018 09:45 AM, Robert Pluim wrote:
>> Robert Pluim <address@hidden> writes:
>>
>>>> Do you get an assertion failure if you enable assertion checking? If we're 
>>>> seeing this kind of problem from the compiler expectation alone, I'll 
>>>> definitely revert that change.
>>>
>>> No, --enable-checking=all gets me a different segfault:
>>
>> And in fact I get that segfault even with
>> fca8372020248318f1d0007378607a912b19026e reverted, but only with
>> --enable-checking=all
>
> Can you repro with an -O0 build?

Yes. Backtrace:

(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x000000000066dd30 in do_one_unbind (this_binding=0x7fffffffbf40, 
unwinding=true, bindflag=SET_INTERNAL_UNBIND)
    at eval.c:3457
#2  0x000000000066e17e in unbind_to (count=48, value=XIL(0)) at eval.c:3576
#3  0x00000000006be902 in exec_byte_code (bytestr=XIL(0xf1dbf4), 
vector=XIL(0xef3585), maxdepth=make_number(5), 
    args_template=XIL(0), nargs=0, args=0x0) at bytecode.c:652
#4  0x000000000066cce0 in funcall_lambda (fun=XIL(0xf015c5), nargs=3, 
arg_vector=0xef3585) at eval.c:3108
#5  0x000000000066bbf8 in Ffuncall (nargs=4, args=0x7fffffffc438) at eval.c:2827
#6  0x00000000006be824 in exec_byte_code (bytestr=XIL(0xf178e4), 
vector=XIL(0xf2fca5), maxdepth=make_number(4), 
    args_template=XIL(0), nargs=0, args=0x0) at bytecode.c:632
#7  0x000000000066cce0 in funcall_lambda (fun=XIL(0xf014a5), nargs=4, 
arg_vector=0xf2fca5) at eval.c:3108
#8  0x000000000066bbf8 in Ffuncall (nargs=5, args=0x7fffffffc8e8) at eval.c:2827
#9  0x00000000006be824 in exec_byte_code (bytestr=XIL(0xef7444), 
vector=XIL(0xf0d6c5), maxdepth=make_number(6), 
    args_template=XIL(0), nargs=0, args=0x0) at bytecode.c:632
#10 0x000000000066cce0 in funcall_lambda (fun=XIL(0xefd155), nargs=9, 
arg_vector=0xf0d6c5) at eval.c:3108
#11 0x000000000066c4d1 in apply_lambda (fun=XIL(0xefd155), args=XIL(0xefa303), 
count=30) at eval.c:2962
#12 0x000000000066a40d in eval_sub (form=XIL(0xefa483)) at eval.c:2335
#13 0x00000000006a3627 in readevalloop (readcharfun=XIL(0x6a50), 
infile0=0x7fffffffd210, sourcename=XIL(0xf38814), 
    printflag=false, unibyte=XIL(0), readfun=XIL(0), start=XIL(0), end=XIL(0)) 
at lread.c:2073
#14 0x00000000006a17ce in Fload (file=XIL(0xf38894), noerror=XIL(0), 
nomessage=XIL(0), nosuffix=XIL(0), 
    must_suffix=XIL(0)) at lread.c:1457
#15 0x000000000066a2e4 in eval_sub (form=XIL(0xe9ae83)) at eval.c:2304
#16 0x00000000006a3627 in readevalloop (readcharfun=XIL(0x6a50), 
infile0=0x7fffffffd5f0, sourcename=XIL(0xee6394), 
    printflag=false, unibyte=XIL(0), readfun=XIL(0), start=XIL(0), end=XIL(0)) 
at lread.c:2073
#17 0x00000000006a17ce in Fload (file=XIL(0xee6274), noerror=XIL(0), 
nomessage=XIL(0), nosuffix=XIL(0), 
    must_suffix=XIL(0)) at lread.c:1457
#18 0x000000000066a2e4 in eval_sub (form=XIL(0xee3aa3)) at eval.c:2304
#19 0x00000000006696e0 in Feval (form=XIL(0xee3aa3), lexical=XIL(0)) at 
eval.c:2110
#20 0x000000000059ed23 in top_level_2 () at keyboard.c:1122
#21 0x0000000000667743 in internal_condition_case (bfun=0x59ed00 <top_level_2>, 
handlers=XIL(0x53d0), 
    hfun=0x59e6ef <cmd_error>) at eval.c:1336
#22 0x000000000059ed67 in top_level_1 (ignore=XIL(0)) at keyboard.c:1130
#23 0x0000000000666c04 in internal_catch (tag=XIL(0xcae0), func=0x59ed25 
<top_level_1>, arg=XIL(0)) at eval.c:1101
#24 0x000000000059ec52 in command_loop () at keyboard.c:1091
#25 0x000000000059e1d4 in recursive_edit_1 () at keyboard.c:698
#26 0x000000000059e3ce in Frecursive_edit () at keyboard.c:769
#27 0x000000000059c223 in main (argc=5, argv=0x7fffffffdbb8) at emacs.c:1929
(gdb) up
#1  0x000000000066dd30 in do_one_unbind (this_binding=0x7fffffffbf40, 
unwinding=true, bindflag=SET_INTERNAL_UNBIND)
    at eval.c:3457
3457          this_binding->unwind.func (this_binding->unwind.arg);
(gdb) p this_binding->unwind.arg
$1 = XIL(0)