Redefining built-in commands.

[Don Howard]

I've run across a bug involving redefinition of built-in commands:

If the command has an alias, the alias is not redefined. Instead, the
alias is left in an inconsistent state and causes a crash when invoked.

Should gdb allow users to redefine built-in commands?   If so, should the 
orignial alias continue to behave like the original built-in, or should 
it's behavior be modified also?

-- 
dhoward@redhat.com
gdb engineering