[HACK] Very temporary fix for reindex failure

Author: sipa

src/main.cpp

@@ -3877,7 +3877,7 @@ bool LoadExternalBlockFile(const CChainParams& chainparams, FILE* fileIn, CDiskB
     int nLoaded = 0;
     try {
         // This takes over fileIn and calls fclose() on it in the CBufferedFile destructor
-        CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SIZE, MAX_BLOCK_SIZE+8, SER_DISK, CLIENT_VERSION | SERIALIZE_TRANSACTION_WITNESS);
+        CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SIZE*4, 4*MAX_BLOCK_SIZE+8, SER_DISK, CLIENT_VERSION | SERIALIZE_TRANSACTION_WITNESS);
         uint64_t nRewind = blkdat.GetPos();
         while (!blkdat.eof()) {
             boost::this_thread::interruption_point();
@@ -3896,7 +3896,7 @@ bool LoadExternalBlockFile(const CChainParams& chainparams, FILE* fileIn, CDiskB
                     continue;
                 // read size
                 blkdat >> nSize;
-                if (nSize < 80 || nSize > MAX_BLOCK_SIZE)
+                if (nSize < 80 || nSize > 4*MAX_BLOCK_SIZE)
                     continue;
             } catch (const std::exception&) {
                 // no valid block header found; don't complain