X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=src%2Fdata%2Fcasereader.c;h=3c062d9068b6355ace4f8e3caf005b89cd7c25ad;hb=d908f52b818f4fdf2ab23797756812ec2986bd2b;hp=1baeef5d8411b42a0612da6e20855f4c7714a87a;hpb=e850a37743edb8035b15c4ed313a2b8fdafdc696;p=pspp-builds.git

diff --git a/src/data/casereader.c b/src/data/casereader.c
index 1baeef5d..3c062d90 100644
--- a/src/data/casereader.c
+++ b/src/data/casereader.c
@@ -97,6 +97,8 @@ casereader_clone (const struct casereader *reader_)
 {
   struct casereader *reader = (struct casereader *) reader_;
   struct casereader *clone;
+  if ( reader == NULL ) 
+    return NULL;
 
   if (reader->class->clone == NULL)
     insert_shim (reader);