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Fix potential headers-first NPE race

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This commit is contained in:
Matt Corallo 2014-10-01 17:39:04 -07:00 committed by Mike Hearn
parent b0b8eb28d3
commit 3398216449
1 changed files with 4 additions and 0 deletions
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4
core/src/test/java/org/bitcoinj/core/BitcoindComparisonTool.java
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@ -157,6 +157,10 @@ public class BitcoindComparisonTool {
return null;
} else if (m instanceof GetHeadersMessage) {
try {
if (currentBlock.block == null) {
log.info("Got a request for a header before we had even begun processing blocks!");
return null;
}
LinkedList<Block> headers = new LinkedList<Block>();
Block it = blockList.hashHeaderMap.get(currentBlock.block.getHash());
while (it != null) {