Hello again, I wanted to update you that I opened a related PR for this issue for the next 3.6.x version. https://github.com/apache/tinkerpop/pull/2738
Thanks in advance, Mavroudis Mantonitsas Στις Πέμ 22 Αυγ 2024 στις 1:09 μ.μ., ο/η Μαυρουδής Μαντονίτσας < m.mantonit...@gmail.com> έγραψε: > Hello, > > I found an issue with the .Net driver driver when upgrading to .NET 8.0. > The issue occurs when searching for a vertex that does not exist > e.g. var vertex = await _g.V(id).Promise(t => t.Next()); > If the vertex does not exist it throws this exception : > "System.InvalidOperationException: Enumeration already finished." > > After investigation I found out that the problem is located here : > https://github.com/apache/tinkerpop/blob/master/gremlin-dotnet/src/Gremlin.Net/Process/Traversal/DefaultTraversal.cs#L212 > > Current is always in a state of throwing an exception if the Traversers are > empty. Before MoveNext() is called it throws "Enumeration has not started. > Call MoveNext." and after the call the above exception > ("System.InvalidOperationException: Enumeration already finished."). > > I played around a little and found that a check if the Enumerator did > move, like this > > return MoveNext() ? Current : default; > > solved the issue for me. > > I do not have an account to open a Jira ticket so I'm reporting this issue > here. > > Mavroudis Mantonitsas >
