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Bug
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    Resolution: Fixed
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Major
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    Jenkins 1.565.1
 
The button "Keep this build forever" is not visible in the build summary page when a BuildDiscarder other than LogRotator is configured. I don't think this is intentionally.
The problem is in Jelly file core\src\main\resources\hudson\model\Run\logKeep.jelly, line 30:
<j:if test="${it.parent.logRotator!=null and it.canToggleLogKeep()}">
Should be fixed to:
<j:if test="${it.parent.buildDiscarder!=null and it.canToggleLogKeep()}">
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