Skip a QUIC_BUG in QuicConnection::SendAllPendingAcks when connection is closed.

PiperOrigin-RevId: 610511462

quiche/quic/core/quic_connection.cc

diff --git a/quiche/quic/core/quic_connection.cc b/quiche/quic/core/quic_connection.cc
index 8f3437f..f7dcd48 100644
--- a/quiche/quic/core/quic_connection.cc
+++ b/quiche/quic/core/quic_connection.cc
@@ -5860,14 +5860,13 @@
     if (!flushed) {
       // Connection is write blocked.
       QUIC_BUG_IF(quic_bug_12714_33,
-                  !writer_->IsWriteBlocked() &&
+                  connected_ && !writer_->IsWriteBlocked() &&
                       !LimitedByAmplificationFactor(
                           packet_creator_.max_packet_length()) &&
                       !IsMissingDestinationConnectionID())
           << "Writer not blocked and not throttled by amplification factor, "
              "but ACK not flushed for packet space:"
           << PacketNumberSpaceToString(static_cast<PacketNumberSpace>(i))
-          << ", connected: " << connected_
           << ", fill_coalesced_packet: " << fill_coalesced_packet_
           << ", blocked_by_no_connection_id: "
           << (peer_issued_cid_manager_ != nullptr &&