X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fdatasheet.c;h=f76b1908d50f1dbdeeff94af7f9d6ecd2150ca16;hb=d22c3971e926ceaf62416c6482fe0fb1dc5407f0;hp=913c8e5aff495f97055b8a7a62579716d3840f77;hpb=bacc3f20714fef3025d79c439993af3403f20bcc;p=pspp-builds.git

diff --git a/src/data/datasheet.c b/src/data/datasheet.c
index 913c8e5a..f76b1908 100644
--- a/src/data/datasheet.c
+++ b/src/data/datasheet.c
@@ -428,6 +428,7 @@ bool
 datasheet_get_value (const struct datasheet *ds, casenumber row, size_t column,
                      union value *value, int width)
 {
+  assert ( row >= 0 );
   return rw_case ((struct datasheet *) ds,
                   OP_READ, row, column, value_cnt_from_width (width), value);
 }