[jira] [Assigned] (GROOVY-9822) StackOverflowError in STC

["Eric Milles (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-9822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles reassigned GROOVY-9822:
-----------------------------------

    Assignee: Eric Milles

> StackOverflowError in STC
> -------------------------
>
>                 Key: GROOVY-9822
>                 URL: https://issues.apache.org/jira/browse/GROOVY-9822
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static compilation
>    Affects Versions: 3.0.6
>            Reporter: Christopher Smith
>            Assignee: Eric Milles
>            Priority: Major
>
> This appears similar to GROOVY-9565, but it's happening in a context that is generics-free as far as I can tell. 
> {code}
> Caused by: java.lang.StackOverflowError
>     at org.codehaus.groovy.ast.decompiled.DecompiledClassNode.isUsingGenerics (DecompiledClassNode.java:86)
>     at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsContext (StaticTypeCheckingSupport.java:1880)
>     at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsContext (StaticTypeCheckingSupport.java:1870)
>     at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsContext (StaticTypeCheckingSupport.java:1827)
>     at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsContext (StaticTypeCheckingSupport.java:1816)
>     at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsContext (StaticTypeCheckingSupport.java:1882)
> {code}
> I managed attempted to trim down the example, but not without referring to the TinkerPop classes (3.4.8). This code triggers the recursion:
> {code:groovy}
> import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource
> import org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.ReadOnlyStrategy
> import org.apache.tinkerpop.gremlin.structure.Graph
> import groovy.transform.CompileStatic
> @CompileStatic
> class Groovy9822 {
>     static GraphTraversalSource readOnly(Graph graph) {
>         def i = ReadOnlyStrategy.instance()
>         graph.traversal().withStrategies(i)
>     }
> }
> {code}
> Removing the second {{i}} so that the varargs is empty and the instance is not passed to {{withStrategies}} prevents the error. (In the original code, the invocation was inline with no local variable; I introduced it to make comparative demonstration easier, and its presence seems to be irrelevant.) In case it is relevant, the {{withStrategies}} method takes a non-generic {{TraversalStrategy...}}, but the class declaration of {{ReadOnlyStrategy}} is as follows:
> {code:java}
> public final class ReadOnlyStrategy extends AbstractTraversalStrategy<TraversalStrategy.VerificationStrategy> implements TraversalStrategy.VerificationStrategy
> {code}



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