From e9baf52ef8219c1223457d35b503dcedddee0338 Mon Sep 17 00:00:00 2001
From: John Darrington <john@darrington.wattle.id.au>
Date: Sun, 5 May 2019 12:19:42 +0200
Subject: [PATCH] graph.c (run_barchart): Add assertion.

We don't support multidimensional barcharts.
---
 src/language/stats/graph.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/language/stats/graph.c b/src/language/stats/graph.c
index 2eeccca206..2d60467845 100644
--- a/src/language/stats/graph.c
+++ b/src/language/stats/graph.c
@@ -416,6 +416,7 @@ run_barchart (struct graph *cmd, struct casereader *input)
   struct freq **cells = NULL;
   int n_cells = 0;
 
+  assert (cmd->n_by_vars <= 2);
   for (grouper = casegrouper_create_vars (input, cmd->by_var,
                                           cmd->n_by_vars);
        casegrouper_get_next_group (grouper, &group);
-- 
2.30.2