Treating error.stack as immutable? about trace

[AndreasMadsen]

@alcuadrado From what I'm reading in the thread, it will still be possible to set [[ErrorData]] on Error construction. So that should be okay. Dealing with uncaughtException is going to be nasty, so I hope that won't be the case.

[alcuadrado]

I'm not that familiar with the last few versions of the EcmaScript standard, but this comment says that the proposal will forbid modifying [[ErrorData]].

But I read again the proposal, and if I understand correctly this will let you assign error.stack, circumventing the immutability of [[ErrorData]]. If this is correct this issue can be ignored as trace could still work.