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Fix #492 - database corruption when closing

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The database was attempting to pop blocks for which there was no undo
history. These changes make it impossible to pop blocks if there isn't
a fork db history.
This commit is contained in:
Daniel Larimer 2016-02-15 12:33:21 -05:00 committed by theoreticalbts
parent e46af9f372
commit 89fbb11bb6
2 changed files with 7 additions and 3 deletions
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5
libraries/chain/db_block.cpp
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@ -417,9 +417,10 @@ void database::pop_block()
auto head_id = head_block_id();
optional<signed_block> head_block = fetch_block_by_id( head_id );
GRAPHENE_ASSERT( head_block.valid(), pop_empty_chain, "there are no blocks to pop" );
pop_undo();
_block_id_to_block.remove( head_id );
_fork_db.pop_block();
_block_id_to_block.remove( head_id );
pop_undo();
_popped_tx.insert( _popped_tx.begin(), head_block->transactions.begin(), head_block->transactions.end() );

5
libraries/chain/fork_database.cpp
View file

@ -38,7 +38,10 @@ void fork_database::reset()
void fork_database::pop_block()
{
if( _head ) _head = _head->prev.lock();
FC_ASSERT( _head, "no blocks to pop" );
auto prev = _head->prev.lock();
FC_ASSERT( prev, "poping block would leave head block null" );
_head = prev;
}
void fork_database::start_block(signed_block b)