try to find where it breaks

Author: hendrikmuhs

keyvi/include/keyvi/index/internal/index_writer_worker.h

@@ -330,6 +330,7 @@ class IndexWriterWorker final {
           payload_.segments_weak_.reset();
 
           // delete old segment files
+          std::cout << "delete old segments" << std::endl;
           for (const segment_t& s : p.Segments()) {
             TRACE("delete old file: %s", s->GetDictionaryFilename().c_str());
 
@@ -341,6 +342,7 @@ class IndexWriterWorker final {
             // if there are open file handles the OS defers real deletion for us
             s->RemoveFiles();
           }
+          std::cout << "delete old segments done" << std::endl;
 
           p.SetMerged();