bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs

[Eli Zaretskii <eliz@gnu.org>]

> From: Michael Welsh Duggan <mwd@cert.org>
> Cc: Michael Welsh Duggan <mwd@md5i.com>,
>         "schwab@linux-m68k.org"
>  <schwab@linux-m68k.org>,
>         "47244@debbugs.gnu.org" <47244@debbugs.gnu.org>
> Date: Thu, 08 Apr 2021 12:05:57 -0400
> 
> >> #26 0x000055555583108e in print_error_message
> >> (data=XIL(0x55555732d343), stream=XIL(0x30), context=0x7ffff2c64148
> >> "", caller=XIL(0)) at ../../master/src/print.c:944
> >>         error_conditions = XIL(0x7ffff2c2da13)
> >>         errname = XIL(0xb820)
> >>         errmsg = make_fixnum(23456248526235)
> >>         file_error = XIL(0x7fffffffd4c0)
> >>         tail = XIL(0x30)
> >
> > What error message does this attempt to print?
> 
> (gdb) p errname
> $8 = XIL(0xb820)
> (gdb) xtype
> Lisp_Symbol
> (gdb) xpr
> Lisp_Symbol
> $9 = (struct Lisp_Symbol *) 0x555555e6e8a0 <lispsym+47136>
> "quit"
> (gdb) p errmsg
> $10 = XIL(0x55555571d654)
> (gdb) xpr
> Lisp_String
> $11 = (struct Lisp_String *) 0x55555571d650 <builtin_lisp_symbol+44>
> 0
> (gdb) p error_conditions
> $14 = XIL(0x7ffff2c2da33)
> (gdb) xpr
> Lisp_Cons
> $15 = (struct Lisp_Cons *) 0x7ffff2c2da30
> {
>   u = {
>     s = {
>       car = XIL(0xb820),
>       u = {
>         cdr = XIL(0),
>         chain = 0x0
>       }
>     },
>     gcaligned = 0x20
>   }
> }
> (gdb) xlist
> $16 = 0xb820
> Lisp_Symbol
> $17 = (struct Lisp_Symbol *) 0x555555e6e8a0 <lispsym+47136>
> "quit"
> ---
> nil

So is this the result of your typing C-g?