(lldb) f 1
frame #1: 0x0000000100213720 bitcoind`void CBlock::Unserialize<CBufferedFile>(CBufferedFile&) [inlined] unsigned int ser_readdata32<CBufferedFile>(s=0x00007000082f0c00) at serialize.h:123:7 [opt]
   120 	template<typename Stream> inline uint32_t ser_readdata32(Stream &s)
   121 	{
   122 	    uint32_t obj;
-> 123 	    s.read((char*)&obj, 4);
   124 	    return le32toh(obj);
   125 	}
   126 	template<typename Stream> inline uint32_t ser_readdata32be(Stream &s)
(lldb) f 0
frame #0: 0x0000000100213635 bitcoind`CBufferedFile::read(this=0x00000001018cf630, pch="\x02", nSize=123145439612064) at streams.h:779:13 [opt]
   776 	    //! read a number of bytes
   777 	    void read(char *pch, size_t nSize) {
   778 	        if (nSize + nReadPos > nReadLimit)
-> 779 	            throw std::ios_base::failure("Read attempted past buffer limit");
   780 	        if (nSize + nRewind > vchBuf.size())
   781 	            throw std::ios_base::failure("Read larger than buffer size");
   782 	        while (nSize > 0) {