From 19cec9e7ca6eb00131c60fe5215eccc5b8a08f5d Mon Sep 17 00:00:00 2001
From: Wilf Wilson <wilf@wilf-wilson.net>
Date: Sat, 31 Aug 2024 21:50:15 +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 fc39f4a3d..5551d115b 100644
--- a/tst/standard/attr.tst
+++ b/tst/standard/attr.tst
@@ -948,6 +948,12 @@ gap> gr := Digraph([[3, 6, 7], [3, 6, 8], [1, 2, 3, 6, 7, 8],
 gap> Length(DigraphAllSimpleCircuits(gr));
 259
 
+#  Issue #676
+gap> D := Digraph([[], [3], []]);;
+gap> SetDigraphVertexLabels(D, ["one", "two", "three"]);
+gap> DigraphAllSimpleCircuits(D);
+[  ]
+
 #  DigraphLongestSimpleCircuit
 gap> gr := Digraph([]);;
 gap> DigraphLongestSimpleCircuit(gr);