Can hide_headers_hash in ngx_http_upstream_conf_t be empty?

[Maxim Dounin]

Hello!

On Mon, Aug 13, 2012 at 02:25:24PM +0800, Thomas wrote:

> Hi, all
> 
>      I'm writing a proxy module which sends http requests to local cache
> server through upstream. It seems that the worker will crush if the
> upstream->conf->hide_headers_hash is empty, following is my gdb stack(nginx
> 1.2.2, Apple Mountain Lion):

[...]

> (gdb) p *hash
> $6 = {
>   buckets = 0x0,
>   size = 0
> }
> 
> I checked ngx_http_proxy_module and it fills the hash with some default
> values, but what should I do if i'm not hiding any response header?

It can be empty, but it must be initialized.  In your case it's 
not initialized and this is what causes crash.

Maxim Dounin