$ wish
% pack [scale .s]
% set fooie 5.79e99
5.79e99
% .s config -variable fooie
*** buffer overflow detected ***: wish terminated
======= Backtrace: =========


....
7f2927dad000-7f2927dae000 rw-p 00024000 08:08 3014738
7f2927dae000-7f2927daf000 rw-p 00000000 00:00 0
7ffc9d5d4000-7ffc9d5f5000 rw-p 00000000 00:00 0                          [stack]
7ffc9d5fa000-7ffc9d5fc000 r--p 00000000 00:00 0                          [vvar]
7ffc9d5fc000-7ffc9d5fe000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
Aborted
$
Haven't bothered to include whole stack trace as it is so easy to reproduce
This was on Linux, same thing happens on Mac OS but not Windows