From 27bd464545cecdc445932d8b8cd1e12b955937fd Mon Sep 17 00:00:00 2001
From: "Wilf A. Wilson" <gap@wilf-wilson.net>
Date: Mon, 2 Sep 2024 09:03:25 +0100
Subject: [PATCH] Add test for issue #676

This concerns using DigraphAllSimpleCircuits with
digraphs with non-standard vertex labels.
---
 tst/standard/attr.tst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tst/standard/attr.tst b/tst/standard/attr.tst
index c7f54b004..a1bf70123 100644
--- a/tst/standard/attr.tst
+++ b/tst/standard/attr.tst
@@ -998,6 +998,12 @@ gap> DigraphAllChordlessCycles(D);
   [ 1, 4, 8, 7, 6, 2 ], [ 1, 4, 3, 2 ], [ 1, 4, 3, 7, 6, 5 ], [ 3, 2, 6, 7 ], 
   [ 2, 1, 5, 6 ], [ 2, 1, 5, 8, 7, 3 ] ]
 
+#  Issue #676
+gap> D := Digraph([[], [3], []]);;
+gap> SetDigraphVertexLabels(D, ["one", "two", "three"]);
+gap> DigraphAllSimpleCircuits(D);
+[  ]
+
 #  DigraphLongestSimpleCircuit
 gap> gr := Digraph([]);;
 gap> DigraphLongestSimpleCircuit(gr);