Fix compressed cache

table/block_based_table_builder.cc

@@ -622,8 +622,9 @@ Status BlockBasedTableBuilder::InsertBlockInCache(const Slice& block_contents,
     Cache::Handle* cache_handle = nullptr;
     size_t size = block_contents.size();
 
-    char* ubuf = new char[size];             // make a new copy
+    char* ubuf = new char[size + 1];  // make a new copy
     memcpy(ubuf, block_contents.data(), size);
+    ubuf[size] = type;
 
     BlockContents results;
     Slice sl(ubuf, size);