[jira] [Commented] (GROOVY-8610) STC NPE using DGM collect on Iterator

["John Wagenleitner (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-8610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16492127#comment-16492127 ] 

John Wagenleitner commented on GROOVY-8610:
-------------------------------------------

Stacktrace
{code:java}
BUG! exception in phase 'instruction selection' in source unit 'TestScripttestDGM_collectOnIterator0.groovy' unexpected NullpointerException

at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1092)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:631)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:609)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:586)
....
....
Caused by: java.lang.NullPointerException
at org.codehaus.groovy.ast.GenericsType.<init>(GenericsType.java:50)
at org.codehaus.groovy.ast.GenericsType.<init>(GenericsType.java:58)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.resolveGenericsFromTypeHint(StaticTypeCheckingVisitor.java:2825)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.doInferClosureParameterTypes(StaticTypeCheckingVisitor.java:2746)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.inferClosureParameterTypes(StaticTypeCheckingVisitor.java:2591)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethodCallArguments(StaticTypeCheckingVisitor.java:2556)
at org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor.visitMethodCallExpression(StaticTypeCheckingVisitor.java:3254)
at org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:70)
....
....{code}

> STC NPE using DGM collect on Iterator
> -------------------------------------
>
>                 Key: GROOVY-8610
>                 URL: https://issues.apache.org/jira/browse/GROOVY-8610
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static Type Checker
>    Affects Versions: 2.5.0
>            Reporter: John Wagenleitner
>            Assignee: John Wagenleitner
>            Priority: Major
>
> {code:groovy}
> @groovy.transform.TypeChecked
> def m() {
>     List<String> list = ['foo', 'bar', 'baz']
>     list.iterator().collect { it.startsWith('ba') } == [false, true, true]
> }
> m()
> {code}
> Results in: 
> {code:java}
> BUG! exception in phase 'instruction selection' in source unit 'TestScript.groovy' unexpected NullpointerException
> {code}



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