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https://issues.apache.org/jira/browse/GROOVY-10864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17651768#comment-17651768
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Paul King commented on GROOVY-10864:
------------------------------------

For a number of years, we have used an optimised version of Antlr4:
{code}
implementation "com.tunnelvisionlabs:antlr4-runtime:${versions.antlr4}"
{code}
It has performance improvements and was getting updates meanwhile the original 
project wasn't changing much, e.g. the gap from 4.7 to 4.8 was almost 3 years.

Recently however the original project has had updates, e.g.:
https://repo.maven.apache.org/maven2/org/antlr/antlr4/4.11.1/

We haven't managed to get the optimised version updated with the improvements 
from the original - hence the patched versions. It might be the best we can do 
until that project progresses again.

It isn't ideal though, the patched coordinates show up as unknown in certain 
BOM analysis tools as per attached picture from BOM Dr (beta) tab in Sonatype 
lift:
 !screenshot-1.png! 

> Bump antlr4 to 4.11.1.1
> -----------------------
>
>                 Key: GROOVY-10864
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10864
>             Project: Groovy
>          Issue Type: Dependency upgrade
>            Reporter: Daniel Sun
>            Assignee: Daniel Sun
>            Priority: Major
>             Fix For: 4.0.7
>
>         Attachments: screenshot-1.png
>
>




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