[asterisk-dev] chan_iax problem (was Re: Thoughts on Asterisk release management

[Russell Bryant]

Luigi Rizzo wrote:
<snip>

Thank you very much for debugging the problem!

> HOWEVER, the problem lies elsewhere, in this initialization in
> chan_iax2.c::build_user() near line 9679:
> 
>         struct iax2_user tmp_user = {
>                 .name = name,
>         };
> 
> (there are several other instances like this).
> 
> The field "name" is an AST_STRING_FIELD, and for some
> reason, at least with my compiler (gcc 2.95 on FreeBSD 4.11)
> the initialization leaves it to NULL instead of setting the
> correct value.
> 
> Why that happens, i have no idea; however it
> is really something that we should figure out because it is critical.
> Patching ast_str_hash() to handle the NULL argument will prevent
> the crash but not fix the problem.

Well, this is certainly bizarre.  We rely on initializer lists like this all
over the place in Asterisk.  I have never seen one not work.  Perhaps it doesn't
like that tmp_user.name is of type ast_string_field and name is const char *?
(ast_string_field is just a typedef to const char * ...)

To Stephen Davies, or anyone else that has seen the problem, what kind of system
and what version of gcc are you using?

-- 
Russell Bryant
Software Engineer
Digium, Inc.