TCSH exit crashing Sparc

[Paul Ninnis]

We're having the occasional problem using tcsh on a sparc station 1 under
SunOS 4.1
It appears to create a data fault causing a panic condition leading to
rebooting when a terminal user logs out (only occasionally)
(possibly by the use of exit rather than ^D)
This info was recorded in the system messages file along with its PID no

This is the version and the compiler set options obtained by a 'set'
  version tcsh 5.20.02 (Cornell) 12/07/90 options 8b,nls,el,dl,al,dir

At times , no other users or processes are running when this has occurred
Is this a know bug?
Is there a later version of tcsh that fixes it?
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