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https://issues.apache.org/jira/browse/GROOVY-10861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles reassigned GROOVY-10861:
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Assignee: Eric Milles
> ListHashMap is not thread-safe
> ------------------------------
>
> Key: GROOVY-10861
> URL: https://issues.apache.org/jira/browse/GROOVY-10861
> Project: Groovy
> Issue Type: Bug
> Reporter: Eric Milles
> Assignee: Eric Milles
> Priority: Major
>
> {{org.codehaus.groovy.util.ListHashMap}} is used for AST node metadata. It
> is not thread-safe when managing the low-size parallel arrays and size
> counter. If a tool is causing insertion and removal of the same node -- one
> example of this is in
> {{StaticTypesMethodReferenceExpressionWriter#writeMethodReferenceExpression}}
> which stuffs some state in a {{MethodNode}} -- in multiple threads the arrays
> can get out-of-sync. This resulted in {{NullPointerExceptions}} for me.
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