Hard Crash on OS X and Linux (but somewhat environment dependent)

[Stefan Marr]

Hi Gilles:

> On 10 Dec 2014, at 16:42, Gilles Duboscq <duboscq at ssw.jku.at> wrote:
> 
> If you know that all path reaching this are dominated by some specific
> check, you can use it as the condition such that the information from
> this cast will only ever be used in those branches.

Hm, well, there is no check. A Smalltalk method never has a lexical scope, and will thus never try to access the context field.
A Smalltalk block has a lexical scope, and might access it, but it is _always_ guaranteed to have the context frame there.
That’s what I am trying to say with the unsafeCast.
On top of that, `context` is a final field. There is just nothing to check at runtime.

At least, I don’t really see what I could check… 

> In general, we're planning to remove the unsafe operations from
> CompilerDirectives anyway.

Ok, so, your suggestions would be to just get rid of all usages of CompilerDirectives already?


Thanks
Stefan

-- 
Stefan Marr
INRIA Lille - Nord Europe
http://stefan-marr.de/research/