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https://issues.apache.org/jira/browse/COUCHDB-2932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15213014#comment-15213014
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ASF subversion and git services commented on COUCHDB-2932:
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Commit 1be5506e39baa3b4c7b3d64daf8032a5580b38ba in couchdb-fabric's branch
refs/heads/master from [~banjiewen]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb-fabric.git;h=1be5506 ]
Use ICU to compare POSTed view keys when necessary
It's possible for user-supplied view keys to compare equal under ICU
collation but not under Erlang's =:=. Since dict uses =:= for equality
this will result in runtime errors unless we fall back to ICU when
necessary and appropriate.
COUCHDB-2932
> View query crashes if the emited key contains hidden characters
> ---------------------------------------------------------------
>
> Key: COUCHDB-2932
> URL: https://issues.apache.org/jira/browse/COUCHDB-2932
> Project: CouchDB
> Issue Type: Bug
> Components: View Server Support
> Reporter: ILYA
> Priority: Blocker
> Labels: regression
> Fix For: 2.0.0
>
> Attachments: invisible_char.sh
>
>
> In the cases where map function of the view emits invisible characters such
> as U+200B. Subsequent query of the view with the keys not containing
> invisible characters returns `badarg`.
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