What's wrong here?

[#1]

Caution - JMP will crash!!!

Names Default To Here( 1 );

f = Function( {}, 
	iconID = Associative Array( {{Name Expr(), 1}, {Expr(), 2}, {Function(), 3}}, 0 );
);
f();

removing the function() from the list fixes the error.
Taking the associative array out of the outer function fixes the error.

[#2]

It sure does blow JMP away.  You just invented a new fast way to exit from a JMP session......

This needs to go to JMP Support!   Things like this are not supposed to happen.

[#3]

I have another one:

x = Expr(Function());

Show(name Expr(x) == Expr(Function()));
Print("not dead");

f = function({arg},
name Expr(arg) == Expr(Function()))

outside of the function the comparison of x with Function () is OK.

Inside of the function, JMP will already crash when it sees the command - no need to call f.