1 files changed, 1 insertions, 0 deletions
diff --git a/src/io/write.cpp b/src/io/write.cpp
index 5993a69..a216b03 100644
--- a/src/io/write.cpp
+++ b/src/io/write.cpp
@@ -89,6 +89,7 @@ namespace io
             dat += rv;
             len -= rv;
         }
+        std::copy(dat, dat + len, buf);
         buflen = len;
 
     maybe_linebuffered: