Github user okram commented on the issue:
https://github.com/apache/incubator-tinkerpop/pull/325
Testing this morning, I get two test failures.
```
Tests in error:
GroovyProgramTest$Traversals>ProgramTest.g_V_outXcreatedX_aggregateXxX_byXlangX_groupCount_programXTestProgramX_asXaX_selectXa_xX:117
» IllegalState
ProgramTest$Traversals>ProgramTest.g_V_outXcreatedX_aggregateXxX_byXlangX_groupCount_programXTestProgramX_asXaX_selectXa_xX:117
» IllegalState
```
Both these tests make use of a user defined `VertexProgram` that stores
vertices as `HALTED_TRAVERSERS`. The problem is that the vertices are not being
detached.
```
Caused by: java.io.NotSerializableException:
org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph$ComputerVertex
Serialization stack:
- object not serializable (class:
org.apache.tinkerpop.gremlin.process.computer.util.ComputerGraph$ComputerVertex,
value: v[3])
- writeObject data (class: java.util.HashMap)
- object (class java.util.HashMap, {v[3]=3, v[5]=1})
- field (class:
org.apache.tinkerpop.gremlin.process.traversal.traverser.util.AbstractTraverser,
name: t, type: class java.lang.Object)
- object (class
org.apache.tinkerpop.gremlin.process.traversal.traverser.B_LP_O_S_SE_SL_Traverser,
{v[3]=3, v[5]=1})
```
In the past, this would be automatically detached, but now it doesn't seem
to be. I'll fiddle a bit to sew whats going on, but just heads up in case its
obvious to use @dalaro ...
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