Running Microcode 1600
Something got seriously munged in my Unix Streams window.
I was 'cat'ing a file which was messed up -- no newlines in it at all.
I had the screen split with System-U at top, Editor at bottom.
Suddenly the screen went blank white, then the Lambda crashed.  These were the
PC's. WHY showed 27242 to 27221 followed by 27206 and on down.

When I warm-booted and brought up a new Unix window, the same thing happened
during the login prompt!

I debugged the offending process, and couldn't mail a bug report (function
NIL undefined?).  The routine at the top of the stack just said "scheduler".
The bottom routine was a UNIX:UNIX-STREAM <something> method :SETUP-NEXT-INPUT-BUFFER.

-kmc

At PC=#o027242 machine is at MAP-MULTIBUS
At PC=#o027241 machine is at (PGF-MM0 + 13)
At PC=#o027221 machine is at (PGF-MAP-MISS + 3)
At PC=#o027206 machine is at (ADVANCE-SECOND-LEVEL-MAP-REUSE-POINTER + 2)
At PC=#o027205 machine is at (ADVANCE-SECOND-LEVEL-MAP-REUSE-POINTER + 1)