From: John Darrington <john@darrington.wattle.id.au>
Date: Sat, 3 Mar 2012 11:20:45 +0000 (+0100)
Subject: interaction.c: interaction_dump: don't crash on empty interactions (ie those with... 
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df88f907ccf92b69a06d4b26b729b50d571a7d0e;p=pspp

interaction.c: interaction_dump: don't crash on empty interactions (ie those with no variables)
---

diff --git a/src/math/interaction.c b/src/math/interaction.c
index 706092476e..a36755b541 100644
--- a/src/math/interaction.c
+++ b/src/math/interaction.c
@@ -146,11 +146,14 @@ void
 interaction_dump (const struct interaction *i)
 {
   int v = 0;
-  printf ("%s", var_get_name (i->vars[v]));
-  for (v = 1; v < i->n_vars; ++v)
+  if ( i->n_vars == 0)
     {
-      printf (" * %s", var_get_name (i->vars[v]));
+      printf ("(empty)\n");
+      return;
     }
+  printf ("%s", var_get_name (i->vars[v]));
+  for (v = 1; v < i->n_vars; ++v)
+    printf (" * %s", var_get_name (i->vars[v]));
   printf ("\n");
 }