Handle mutability

digraphs · Aug 29, 2024 · ae29cfa · ae29cfa
1 parent a9d02b2
commit ae29cfa
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/gap/attr.gi b/gap/attr.gi
@@ -1579,7 +1579,7 @@ function(D)
     end;
 
     digraph := DigraphSymmetricClosure(DigraphRemoveLoops(
-                                  DigraphRemoveAllMultipleEdges(D)));
+        DigraphRemoveAllMultipleEdges(DigraphMutableCopyIfMutable(D))));
 
     SetDigraphVertexLabels(digraph,
                  Reversed(DigraphDegeneracyOrdering(digraph)));