In message <[email protected]>, =?UTF-8?B?VsOhY2xhdiBCw61sZWs=?= writes:

>Hello
>
>What is the difference  between
>
>  [...]
>       req.request != "DELETE") {
>           /* Non-RFC2616 or CONNECT which is weird. */
>           error 503;

This sets the returned status to "503"

>and
>  [...]
>       req.request != "DELETE") {
>           /* Non-RFC2616 or CONNECT which is weird. */
>            return (error);

This reuses whatever status you might already have received from
the backend, in the case of vcl_recv{} there were none, hence the panic.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
[email protected]         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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