Which # file this block is stored in (blk?????.dat)
Declared in <chain.h>
[[guarded_by(0x7fb95cc62b60), guarded_by(0x7fb97da0e680), guarded_by(0x7fb969040b70), guarded_by(0x7fb96e6773c0), guarded_by(0x7fb96bda8e20), guarded_by(0x7fb96a98ef00), guarded_by(0x7fb97e605ae0), guarded_by(0x7fb96f3e5100), guarded_by(0x7fb958b0aaa0), guarded_by(0x7fb98541f580), guarded_by(0x7fb964557450)]]
int nFile = {0};