[jira] [Assigned] (GROOVY-8111) Stack overflow between WideningCategories lowestUpperBound and parameterizeLowestUpperBound

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

     [ https://issues.apache.org/jira/browse/GROOVY-8111?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles reassigned GROOVY-8111:
-----------------------------------

    Assignee: Eric Milles

> Stack overflow between WideningCategories lowestUpperBound and parameterizeLowestUpperBound
> -------------------------------------------------------------------------------------------
>
>                 Key: GROOVY-8111
>                 URL: https://issues.apache.org/jira/browse/GROOVY-8111
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 2.5.14, 3.0.8, 4.0.0-beta-1
>            Reporter: Eric Milles
>            Assignee: Eric Milles
>            Priority: Critical
>
> I have run into this stack overflow error a few times when editing a Groovy file.  Consider the following:
> {code:groovy}
> // excerpt of org.apache.commons.lang3.tuple.Pair
> class Pair<L, R> implements Map.Entry<L, R>, Comparable<Pair<L, R>>, Serializable {
>   public final L left
>   public final R right
>   private Pair(final L left, final R right) {
>     this.left = left
>     this.right = right
>   }
>   static <L, R> Pair<L, R> of(final L left, final R right) {
>     return new Pair<>(left, right)
>   }
>   L getKey() { left }
>   R getValue() { right }
>   R setValue(R value) { right }
>   int compareTo(Pair<L,R> that) { 0 }
> }
> @groovy.transform.TypeChecked
> def test(thing) {
>   thing != null ?: Pair.of('', ['']) // STCV is trying to get LUB of boolean and Pair<String,List<String>>
> }
> test(null)
> {code}
> Captured on Groovy 2.4.9:
> {code:java}
> java.lang.StackOverflowError
> 	at org.codehaus.groovy.ast.ClassNode.getText(ClassNode.java:1686)
> 	at org.codehaus.groovy.ast.ClassNode.equals(ClassNode.java:813)
> 	at org.codehaus.groovy.ast.ClassNode.equals(ClassNode.java:810)
> 	at org.codehaus.groovy.ast.ClassNode.declaresInterface(ClassNode.java:1082)
> 	at org.codehaus.groovy.ast.ClassNode.implementsInterface(ClassNode.java:1060)
> 	at org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.implementsInterfaceOrIsSubclassOf(StaticTypeCheckingSupport.java:798)
> 	at org.codehaus.groovy.ast.tools.GenericsUtils.extractSuperClassGenerics(GenericsUtils.java:434)
> 	at org.codehaus.groovy.ast.tools.GenericsUtils.parameterizeType(GenericsUtils.java:228)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.findGenericsTypeHolderForClass(WideningCategories.java:269)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.parameterizeLowestUpperBound(WideningCategories.java:233)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.lowestUpperBound(WideningCategories.java:203)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.parameterizeLowestUpperBound(WideningCategories.java:250)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.lowestUpperBound(WideningCategories.java:203)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.parameterizeLowestUpperBound(WideningCategories.java:250)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.lowestUpperBound(WideningCategories.java:203)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.parameterizeLowestUpperBound(WideningCategories.java:250)
> 	at org.codehaus.groovy.ast.tools.WideningCategories.lowestUpperBound(WideningCategories.java:203)
> {code}



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