bug#69431: 30.0.50; Strange fontificaion behavior

[Björn Bidar]

I replied to only Eli by accident.

No difference.
In fact (bootstrap) Emacs already crashes during build:
Breakpoint 1 at 0x424584: file /home/bidar/dev/emacs/emacs/src/emacs.c, line 
441.
(gdb) bt
#0  memcpy
    (__len=8, __src=0x56d8, __dest=<synthetic pointer>,
__dest=<optimized out>, __src=<optimized out>, __len=<optimized out>)
at /usr/include/bits/string_fortified.h:29
#1 hash_string (ptr=<optimized out>, len=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:5057
#2 0x00000000005b3582 in sxhash_obj.part.0.lto_priv.0 (obj=<optimized
out>, depth=depth@entry=3)
    at /home/bidar/dev/emacs/emacs/src/fns.c:5213
#3 0x00000000005b35d4 in sxhash_obj (depth=3, obj=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:5201
#4 sxhash_vector (depth=<optimized out>, vec=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:5151
#5 sxhash_obj.part.0.lto_priv.0 (obj=<optimized out>,
depth=depth@entry=2) at /home/bidar/dev/emacs/emacs/src/fns.c:5229
#6 0x00000000005b35d4 in sxhash_obj (depth=2, obj=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:5201
#7 sxhash_vector (depth=<optimized out>, vec=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:5151
#8 sxhash_obj.part.0.lto_priv.0 (obj=<optimized out>,
depth=depth@entry=1) at /home/bidar/dev/emacs/emacs/src/fns.c:5229
#9 0x00000000005b35d4 in sxhash_obj (depth=1, obj=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:5201
#10 sxhash_vector (depth=<optimized out>, vec=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:5151
#11 sxhash_obj.part.0.lto_priv.0 (obj=<optimized out>,
depth=depth@entry=0) at /home/bidar/dev/emacs/emacs/src/fns.c:5229
#12 0x00000000005b396b in sxhash_obj (depth=0, obj=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:4478
#13 sxhash (obj=<optimized out>) at /home/bidar/dev/emacs/emacs/src/fns.c:5192
#14 hashfn_equal (key=<optimized out>, h=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/fns.c:4479
#15 0x00000000005b5263 in hash_from_key (key=XIL(0x14ebe5d),
h=0xd70ed0) at /home/bidar/dev/emacs/emacs/src/lisp.h:2720
#16 Fputhash (key=XIL(0x14ebe5d), value=XIL(0x14ebe5d),
table=XIL(0xd70ed5)) at /home/bidar/dev/emacs/emacs/src/fns.c:5639
#17 0x0000000000577d13 in purecopy (obj=XIL(0x14ebe5d)) at
/home/bidar/dev/emacs/emacs/src/alloc.c:6087
#18 0x0000000000578334 in Fpurecopy (obj=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/alloc.c:5993
#19 0x0000000000583648 in Fdefalias (symbol=XIL(0x8fb0e0),
definition=XIL(0xe5c8cd), docstring=XIL(0))
    at /home/bidar/dev/emacs/emacs/src/data.c:992
#20 0x00000000005a148f in eval_sub (form=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/eval.c:2531
#21 0x00000000005d3f55 in readevalloop
    (readcharfun=readcharfun@entry=XIL(0x8400),
infile0=infile0@entry=0x7fffffffc040,
sourcename=sourcename@entry=XIL(0x14d8274),
printflag=printflag@entry=false, unibyte=unibyte@entry=XIL(0),
readfun=readfun@entry=XIL(0), start=XIL(0), end=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/lread.c:2601
#22 0x00000000005d4bf3 in Fload
    (file=<optimized out>, noerror=<optimized out>,
nomessage=<optimized out>, nosuffix=<optimized out>,
must_suffix=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/lread.c:1792
#23 0x00000000005a1465 in eval_sub (form=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/eval.c:2539
#24 0x00000000005d3f55 in readevalloop
    (readcharfun=readcharfun@entry=XIL(0x8400),
infile0=infile0@entry=0x7fffffffc360,
sourcename=sourcename@entry=XIL(0xd09994),
printflag=printflag@entry=false, unibyte=unibyte@entry=XIL(0),
readfun=readfun@entry=XIL(0), start=XIL(0), end=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/lread.c:2601
#25 0x00000000005d4bf3 in Fload
    (file=<optimized out>, noerror=<optimized out>,
nomessage=<optimized out>, nosuffix=<optimized out>,
must_suffix=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/lread.c:1792
#26 0x00000000005a1465 in eval_sub (form=<optimized out>) at
/home/bidar/dev/emacs/emacs/src/eval.c:2539
#27 0x000000000050c236 in Feval (lexical=XIL(0x30), form=XIL(0x7ffff2d28423))
    at /home/bidar/dev/emacs/emacs/src/eval.c:2389
#28 top_level_2 () at /home/bidar/dev/emacs/emacs/src/keyboard.c:1183
#29 0x000000000059d787 in internal_condition_case
    (bfun=0x50c170 <top_level_2>, handlers=<optimized out>, hfun=0x50d580 
<cmd_error>)
    at /home/bidar/dev/emacs/emacs/src/eval.c:1537
#30 0x000000000050c292 in top_level_1 (ignore=ignore@entry=XIL(0)) at
/home/bidar/dev/emacs/emacs/src/keyboard.c:1195
#31 0x000000000059d6e1 in internal_catch (tag=<optimized out>,
func=0x50c270 <top_level_1>, arg=XIL(0))
    at /home/bidar/dev/emacs/emacs/src/eval.c:1217
#32 0x000000000050dccb in command_loop () at 
/home/bidar/dev/emacs/emacs/src/keyboard.c:1144
#33 0x000000000068d796 in recursive_edit_1.isra.0 () at
/home/bidar/dev/emacs/emacs/src/keyboard.c:753
#34 0x000000000050fb2a in Frecursive_edit () at
/home/bidar/dev/emacs/emacs/src/keyboard.c:836
#35 0x000000000042ed1f in main (argc=<optimized out>, argv=<optimized out>)
    at /home/bidar/dev/emacs/emacs/src/emacs.c:2633
You can't do that without a process to debug.