on release {} and DHCPv6

[perl-list]

Folks, 

I am testing what custom logs can be created with DHCPv6. I have this in my config file: 


on release { 
log(info,"THIS IS A RELEASE!"); 
if exists dhcp6.ia-na { 
log(info, 
concat( "RELEASED,", 
"IP,",binary-to-ascii(16, 16, ":", substring(option dhcp6.ia-na,16,16)) 
) 
); 
} 
if exists dhcp6.client-id { 
log(info, 
concat( "RELEASED,", 
"DUID,",binary-to-ascii(16, 8, ":", option dhcp6.client-id) 
) 
); 
} 
} 


According to a packet capture, both ia-na (option 3) and client-id (option 1) are present. These options appear to have exactly the same content as they do during a Request. 

However, in the log, all that is printed is "THIS IS A RELEASE!". 

These same sorts of log messages work fine in on commit {} 

Anyone have any idea why these options aren't available during a release? Is there some secret sauce that I am missing here to decode these options during a release? 
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