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-rw-r--r--src/coins.cpp10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/coins.cpp b/src/coins.cpp
index 4d1dbdea4e..877fb8b26c 100644
--- a/src/coins.cpp
+++ b/src/coins.cpp
@@ -117,11 +117,17 @@ CCoinsModifier CCoinsViewCache::ModifyCoins(const uint256 &txid) {
return CCoinsModifier(*this, ret.first, cachedCoinUsage);
}
-CCoinsModifier CCoinsViewCache::ModifyNewCoins(const uint256 &txid) {
+// ModifyNewCoins has to know whether the new outputs its creating are for a
+// coinbase or not. If they are for a coinbase, it can not mark them as fresh.
+// This is to ensure that the historical duplicate coinbases before BIP30 was
+// in effect will still be properly overwritten when spent.
+CCoinsModifier CCoinsViewCache::ModifyNewCoins(const uint256 &txid, bool coinbase) {
assert(!hasModifier);
std::pair<CCoinsMap::iterator, bool> ret = cacheCoins.insert(std::make_pair(txid, CCoinsCacheEntry()));
ret.first->second.coins.Clear();
- ret.first->second.flags = CCoinsCacheEntry::FRESH;
+ if (!coinbase) {
+ ret.first->second.flags = CCoinsCacheEntry::FRESH;
+ }
ret.first->second.flags |= CCoinsCacheEntry::DIRTY;
return CCoinsModifier(*this, ret.first, 0);
}