os/bluestore: add sanity check when compress_extent_map()

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 23b13bda06c0b8965313d40f54d842b06674082f..b437135be5e8095aa72b276d110208b9f525c7aa 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -2072,6 +2072,7 @@ int BlueStore::ExtentMap::compress_extent_map(uint64_t offset, uint64_t length)
       break;
     }
     if (n->logical_offset >= shard_end) {
+      assert(pshard != shards.end());
       ++pshard;
       if (pshard != shards.end()) {
        shard_end = pshard->offset;