Re: Emacs crashes accidentally

[Richard Stallman <rms@gnu.org>]

      Before crashing, I wanted to undo some deletion
    so I typed C-x u C-x z z z ...  When some `z' was pressed,
    Emacs suddenly crashed.

The term "to crash" is often synonymous with "getting some z's" ;-).

    #3  0x010c10b3 in strout (ptr=0x2469648 <Address 0x2469648 out of bounds>, 
    size=27, size_byte=27, printcharfun=19413041,
	multibyte=0) at print.c:417
    #4  0x010c1385 in print_string (string=37526819, printcharfun=19413041) at 
    print.c:506

It looks like STRING is invalid Lisp data.  Please look inside it
and see precisely what is wrong with it. 

    #5  0x010c552d in print_object (obj=37526819, printcharfun=19413041, 
    escapeflag=0) at print.c:2050
    #6  0x010c3c4a in print (obj=37526819, printcharfun=19413041, escapeflag=0) 
    at print.c:1301
    #7  0x010c3059 in Fprinc (object=37526819, printcharfun=19413041) at 
    print.c:847
    #8  0x010c3870 in print_error_message (data=36753309, stream=19413041, 
    context=0x9fbff70c "", caller=19764345)
	at print.c:1090

Where did print_error_message get the string?  Where did it come from?
If it came from DATA, then please try to trace it back.
What are the elements of DATA?