1 files changed, 8 insertions, 0 deletions

diff --git a/src/rpc.cpp b/src/rpc.cpp
index 7d7cc8f..c382926 100644
--- a/src/rpc.cpp
+++ b/src/rpc.cpp
@@ -644,6 +644,14 @@ static void PublishVersioned(const std::string& path, const VersionedBlob& v,
                              std::mutex& fileMutex, uint64& publishedSeq,
                              const char* what)
 {
+    // A default-constructed blob is not a snapshot of anything; it is a
+    // VersionedBlob nobody filled in. Today they are already dropped, because
+    // every serialiser stamps ++gSeq and so never produces 0, and 0 fails the
+    // seq <= publishedSeq test below -- but only for as long as publishedSeq
+    // starts at 0 and nobody writes `seq = gSeq++`. One character, and the
+    // ledger file becomes "[]". Say it out loud instead of relying on it.
+    if (!v.seq)
+        return;
     // A file whose loader threw is not a file this process knows the contents
     // of. Writing it would replace a full record of what was owed with
     // whatever happened to parse before the error.