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Prevent unsigned integer underflow

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Peter Conrad 2017-07-31 20:24:04 +02:00 committed by gladcow
parent 969c8c9958
commit 1654ce5436
1 changed files with 6 additions and 3 deletions
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7
libraries/chain/db_management.cpp
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@ -60,12 +60,15 @@ void database::reindex( fc::path data_dir )
ilog( "reindexing blockchain" ); ilog( "reindexing blockchain" );
auto start = fc::time_point::now(); auto start = fc::time_point::now();
const auto last_block_num = last_block->block_num(); const auto last_block_num = last_block->block_num();
uint32_t flush_point = last_block_num - 10000; uint32_t flush_point = last_block_num < 10000 ? 0 : last_block_num - 10000;
uint32_t undo_point = last_block_num - 50; uint32_t undo_point = last_block_num < 50 ? 0 : last_block_num - 50;
ilog( "Replaying blocks, starting at ${next}...", ("next",head_block_num() + 1) ); ilog( "Replaying blocks, starting at ${next}...", ("next",head_block_num() + 1) );
if( head_block_num() >= undo_point ) if( head_block_num() >= undo_point )
{
if( head_block_num() > 0 )
_fork_db.start_block( *fetch_block_by_number( head_block_num() ) ); _fork_db.start_block( *fetch_block_by_number( head_block_num() ) );
}
else else
{ {
// Right now, we leave undo_db enabled when replaying when the bookie plugin is // Right now, we leave undo_db enabled when replaying when the bookie plugin is