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https://issues.apache.org/jira/browse/LUCENE-7194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15234148#comment-15234148
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Michael McCandless commented on LUCENE-7194:
--------------------------------------------

Thanks [~daddywri].

I think we should just add this to our forbidden API list, then see what fails 
(because it's using these APIs), and correct them...

> Ban Math.toRadians/toDegrees and remove all usages of it
> --------------------------------------------------------
>
>                 Key: LUCENE-7194
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7194
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>            Assignee: Karl Wright
>
> The result of these methods is unreliable and changes across jvm versions: we 
> cannot use these methods.
> The following program prints 0.7722082215479366 on previous versions of java 
> but 0.7722082215479367 on java 9 because Math.toRadians is no longer doing 
> the same thing:
> {code}
> public class test {
>   public static void main(String args[]) throws Exception {
>     System.out.println(Math.toRadians(44.244272));
>   }
> }
> {code}
> This is because of https://bugs.openjdk.java.net/browse/JDK-4477961. 
> I am not really sure its a bug, because the method says that the conversion 
> is "generally inexact". 



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