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https://issues.apache.org/jira/browse/MNG-7701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17693476#comment-17693476
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Elliotte Rusty Harold commented on MNG-7701:
--------------------------------------------
Hmm,
underscore is ascii 95
x is ascii 120
so _x does sort lexicographically before x. That is, I was wrong when I said
"Underscore comes after all alphabetic characters in lexicographic order. 1_y
is effectively the same as 1._y."
It is a little tricky because capital X comes before x but we normalize to
lower case. Thus the 3.8.7 behavior is correct and expected.
> Incompatible version sorting changes
> ------------------------------------
>
> Key: MNG-7701
> URL: https://issues.apache.org/jira/browse/MNG-7701
> Project: Maven
> Issue Type: Bug
> Components: Core
> Affects Versions: 3.8.7, 3.9.0
> Reporter: David M. Lloyd
> Assignee: Elliotte Rusty Harold
> Priority: Major
> Fix For: 3.8.x-candidate, 3.9.1-candidate, waiting-for-feedback
>
>
> Between 3.8.6 and 3.8.7, the sorting of a variety of version strings has
> changed. This table captures the observed relations:
> ||Input 1||3.8.6||3.8.7||Input 2||
> |{{0.x}}|{{>}}|{{==}}|{{0-x}}|
> |{{1.x}}|{{<}}|{{==}}|{{1-x}}|
> |{{1.x}}|{{<}}|{{>}}|{{1_y}}|
> |{{1.y}}|{{<}}|{{>}}|{{1_x}}|
> |{{1-alpha}}|{{>}}|{{==}}|{{1.alpha}}|
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