message: PragueDump crashes if storage has no ops (as it happens now with broken docs)
diff: @@ -46,7 +46,8 @@ async function loadAllSequencedMessages(
  let logMsg = `)`;
  let allMessages = sequencedMessages;
  if (initialMessages) {
  - const lastSequenceNumber = sequencedMessages[sequencedMessages.length - 1].sequenceNumber;
  + const lastSequenceNumber = sequencedMessages.length === 0 ?
  + 0 : sequencedMessages[sequencedMessages.length - 1].sequenceNumber;
  const filtered = initialMessages.filter((a) => a.sequenceNumber > lastSequenceNumber);
  const sorted = filtered.sort((a, b) => a.sequenceNumber - b.sequenceNumber);
  logMsg = `, ${initialMessages.length} initial ws messages, ${initialMessages.length - sorted.length} dup)`;
  