QUICK CLUSTER: Fix crash on negative parameters

[pspp] / src / language / stats / quick-cluster.c

diff --git a/src/language/stats/quick-cluster.c b/src/language/stats/quick-cluster.c
index bc66cce795caf06932ed3da6269b306bd0a6cd52..946181b01a6b22e3061a4b26c961ed6f88236bd7 100644 (file)
--- a/src/language/stats/quick-cluster.c
+++ b/src/language/stats/quick-cluster.c
@@ -548,6 +548,11 @@ cmd_quick_cluster (struct lexer *lexer, struct dataset *ds)
                    {
                      lex_force_int (lexer);
                      qc.ngroups = lex_integer (lexer);
+                     if (qc.ngroups <= 0)
+                       {
+                         lex_error (lexer, _("The number of clusters must be positive"));
+                         goto error;
+                       }
                      lex_get (lexer);
                      lex_force_match (lexer, T_RPAREN);
                    }
@@ -558,6 +563,11 @@ cmd_quick_cluster (struct lexer *lexer, struct dataset *ds)
                    {
                      lex_force_int (lexer);
                      qc.maxiter = lex_integer (lexer);
+                     if (qc.maxiter <= 0)
+                       {
+                         lex_error (lexer, _("The number of iterations must be positive"));
+                         goto error;
+                       }
                      lex_get (lexer);
                      lex_force_match (lexer, T_RPAREN);
                    }