X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=psftp.c;h=094e68b0ce417b3d9cac3ed40894ce33194991c3;hb=f1ece56e40435efdf8eaeb2b11b34d73ee3f4a22;hp=ead8614047b8562713c6d875cc2d83c281e949f6;hpb=6e1ac921944fc1210bfdc93e4360201d23a9de7d;p=PuTTY.git

diff --git a/psftp.c b/psftp.c
index ead86140..094e68b0 100644
--- a/psftp.c
+++ b/psftp.c
@@ -1512,6 +1512,8 @@ int from_backend(int is_stderr, char *data, int datalen)
     unsigned char *p = (unsigned char *) data;
     unsigned len = (unsigned) datalen;
 
+    assert(len > 0);
+
     /*
      * stderr data is just spouted to local stderr and otherwise
      * ignored.