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https://issues.apache.org/jira/browse/TINKERPOP-2201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16831822#comment-16831822
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ASF GitHub Bot commented on TINKERPOP-2201:
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spmallette commented on pull request #1100: TINKERPOP-2201: Change the typing
of from() and to() to accept wildcard instead of Vertex
URL: https://github.com/apache/tinkerpop/pull/1100
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> Gremlin-test failed while static type checking when use secure configuration
> ----------------------------------------------------------------------------
>
> Key: TINKERPOP-2201
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2201
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.4.1
> Reporter: Sel-fish Finch
> Priority: Minor
>
> Reproduce:
> 1. Run Gremlin Server with `gremlin-server-secure.yaml` which use
> SimpleSandboxExtension for security
> 2. Run Gremlin-test to verify the behavior
>
> Among the other similar errors, take
> `*g_addV_asXfirstX_repeatXaddEXnextX_toXaddVX_inVX_timesX5X_addEXnextX_toXselectXfirstXX*`
> in `*features/map/AddEdge.feature*` as an example:
> {code:java}
> features/map/AddEdge.feature:
> g_addV_asXfirstX_repeatXaddEXnextX_toXaddVX_inVX_timesX5X_addEXnextX_toXselectXfirstXX
> And the traversal of
> GremlinServerError: 597: startup failed:
> Script5.groovy: 1: [Static type checking] - Cannot call
> org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal
> <org.apache.tinkerpop.gremlin.structure.Vertex,
> org.apache.tinkerpop.gremlin.structure.Edge>#to(org.apache.tinkerpop.gremlin.process.traversal.Traversal
> <java.lang.Object extends java.lang.Object,
> org.apache.tinkerpop.gremlin.structure.Vertex>) with arguments
> [org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal <A
> extends java.lang.Object, B extends java.lang.Object>]
> @ line 1, column 1.
>
> g.addV().as("first").repeat(__.addE("next").to(__.addV()).inV()).times(5).addE("next").to(__.select("first"))
> ^
> 1 error
> {code}
> In my knowledge, the reason is that static type checking will verify the
> class type of parameter, and the definition in `GraphTraversal` seems too
> strict for `SimpleSandboxExtension`.
> As I changed the method definition:
> {code:bash}
> - public default GraphTraversal<S, E> to(final Traversal<?, Vertex>
> toVertex) {
> + public default GraphTraversal<S, E> to(final Traversal<?, ?> toVertex) {
> {code}
> The mentioned case passed.
>
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