V8 escapable handle scope

[bartlomieju]

No description provided.

[bartlomieju]

@ry I think problems with lifetimes still hold. Do you want to go ahead and land this now or shall we fix them first?

[ry]

@bartlomieju What are the lifetime problems?

[bartlomieju]

@ry example by Bert that should fail, but it compiles fine:

  let local: Local<v8::String>;
  {
    let scope = &mut v8::HandleScope::new(&mut locker);
    local = v8::String::new(scope, "bla").unwrap();
  }

Note that it uses HandleScope but the same rules apply to EscapableHandleScope