Regarding b/141924462

Hello QUICHE team,

I am experimenting with the public QUICHE sample server/client on the IETF QUIC path , using the public quic_server / quic_toy_server binaries.

While looking into address validation / Retry behavior, I noticed this code path in quic_framer.cc
// TODO(b/141924462) Remove this QUIC_BUG once we do support sending RETRY.
QUIC_BUG_IF(quic_bug_12975_7,
header.version_flag && header.long_packet_type == RETRY)
<< "Sending IETF RETRY packets is not currently supported " << header;

I would appreciate any clarification, especially on whether this is a public-repo limitation or simply an unimplemented feature in the current open-source IETF server path?

Is the QUICHE used internally in production/commercial deployments different in this respect from the public repo?