Re: eval-last-sexp -> syntax error -> deletes rest of buffer!

[Richard Stallman]

    Set the point right after the (malformed) expression and hit C-x C-e.
    You will find that an error is correctly reported (invalid-read- 
    syntax ")"), but that the complete rest of the buffer (after the  
    point) IS DELETED.

    Annoyingly, undo doesn't bring it back, nor is the deleted part of  
    the buffer  properly killed and put into the killring.

The text has not been killed.
The buffer is only narrowed temporarily.