From 235b4e8bcc402940fe7e0a466d54341a36f5f801 Mon Sep 17 00:00:00 2001
From: John Darrington <john@darrington.wattle.id.au>
Date: Thu, 11 May 2017 14:01:50 +0200
Subject: [PATCH] FACTOR: Don't try to perform analysis if there are no
 variables.

---
 src/language/stats/factor.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/language/stats/factor.c b/src/language/stats/factor.c
index 49bc8a4d67..e83a6497b5 100644
--- a/src/language/stats/factor.c
+++ b/src/language/stats/factor.c
@@ -1467,6 +1467,12 @@ cmd_factor (struct lexer *lexer, struct dataset *ds)
   if (factor.n_vars < 2)
     msg (MW, _("Factor analysis on a single variable is not useful."));
 
+  if (factor.n_vars < 1)
+    {
+      msg (ME, _("Factor analysis without variables is not possible."));
+      goto error;
+    }
+
   if (matrix_reader)
     {
       struct idata *id = idata_alloc (factor.n_vars);
-- 
2.30.2