Eric Milles created GROOVY-10861:
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Summary: 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
{{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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