graph.c (run_barchart): Add assertion.

We don't support multidimensional barcharts.

diff --git a/src/language/stats/graph.c b/src/language/stats/graph.c
index 2eeccca2068f9fc1bc8ede8cfc8adbfea502cc97..2d60467845361a61b78aaea5e95382ac7372887e 100644 (file)
--- 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);