Guard null it->second

2018-05-30 03:06:13 -11:00
parent 525c7b98a9
commit e2c2eec41a
1 changed files with 2 additions and 1 deletions
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5147,7 +5147,8 @@ void static CheckBlockIndex()
    // Build forward-pointing map of the entire block tree.
    std::multimap<CBlockIndex*,CBlockIndex*> forward;
    for (BlockMap::iterator it = mapBlockIndex.begin(); it != mapBlockIndex.end(); it++) {
-        forward.insert(std::make_pair(it->second->pprev, it->second));
+        if ( it->second != 0 )
+            forward.insert(std::make_pair(it->second->pprev, it->second));
    }
    
    assert(forward.size() == mapBlockIndex.size());