`Q.defer()` causes a `ReferenceError: __iced_deferrals is not defined`.

[vjpr]

def = Q.defer() compiles to

var def;

def = Q.defer({
  lineno: 0,
  context: __iced_deferrals
});

which causes a ReferenceError: __iced_deferrals is not defined.

If defer is a property of an object it shouldn't be icefied.

[maxtaco]

This is an annoyance for sure, but now defer is a keyword, and I sometimes use it as a property of an object, unfortunately (see Rendezvous and friends for an example). The workaround I suggest is something like

def = Q["defer"].apply(Q, [])