[PATCH] Fix segfaults in dwarf array pointer subscripting when -vvv is specified

[Yichun Zhang]

Hello!

On Wed, Nov 21, 2018 at 11:32 PM Yichun Zhang (agentzh)
<yichun@openresty.com> wrote:
>
> location_context::new_symref() forgot to initialize sym->tok which led
> to NULL e->tok pointers.
>
> Thanks to Mozilla rr for greatly simplifying debugging this issue.
>
> Added some tests to cover this fix.

Committed.

Yichun