bug#29661: 27.0.50; emacs crashing on exchange-point-and-mark

[martin rudalics]

> So this python
>
> #!/usr/bin/python
> num = 1000000
> while num:
>      print "123456789012345678901234567890"
>      num = num -1
> print "eureka"
>
> redirecting output to a file, open that file with emacs -Q
> incremental search for eur then C-x C-x  move the cursor down one or two
> lines and emacs consistently crashes for me

30 MB without newlines?  This makes my Emacs pretty unresponsive here.
However, on Windows I apparently don't get such crashes.

martin