Strange behavior of coffee compiler

I found an strange behavior of coffee compiler on an simple expression, which differs from a interactive compiler reaction at coffeescript.org site.

When I try to compile next string with coffee:

(console.log i; break) for i in [0..10]

I got:

SyntaxError: In repl, cannot use a pure statement in an expression.at SyntaxError (unknown source) ...

But the same expression in interactive compiler at coffescript.org compiled just fine, as expected by me to:

var i, _i;

for (i = _i = 0; _i <= 10; i = ++_i) {
  console.log(i);
  break;
}

Why coffee don't like () grouping here?

UPD

Another strange thing - it happens not always, sometimes, after a lot of tries and variations, coffee starts to compile absolutely the same expression normally, without errors.

But seems like in interactive mode, coffee fails always.

Another strange thing I found - this error happens only when I use the 'break' keyword. Expression '(console.log i; i+1) for i in [0..5]' works just fine and returns an array.