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https://issues.apache.org/jira/browse/MATH-1137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14059002#comment-14059002
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Gilles commented on MATH-1137:
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bq. The purpose of testing is to find errors, not to pass tests.
If there is no test to leave a trace of something that has been changed, then
that thing can be changed again later without anyone noticing.
bq. Do you have any idea where this code is described in the BOBYQA paper?
No.
One goal of CM is that the _implementation_ should be documented (or
self-documenting).
IMO, we'd be better off if the algorithm were reimplemented from scratch (as
was already discussed on the MATH-621 page).
bq. I can verify I have run BOBYQA hundreds of times on lots of problems, but
have no idea whether this bit of code has ever been exercised.
That would be quite easy, if you can easily rerun those codes. You'd just have
to uncomment line 538, and the code will throw an exception if it ever enters
the block.
> BOBYQA incorrect indexing
> -------------------------
>
> Key: MATH-1137
> URL: https://issues.apache.org/jira/browse/MATH-1137
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.3
> Reporter: Nigel Goodwin
>
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