D10840.diff
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	diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php
	--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php
	+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php
	@@ -72,13 +72,28 @@

	private function loadSubversionParents() {
	$n = (int)$this->identifier;
	- if ($n > 1) {
	- $ids = array($n - 1);
	- } else {
	- $ids = array();
	+
	+ if ($n <= 1) {
	+ return array();
	}

	- return $ids;
	+ $ids = array($n - 1);
	+ $repository = $this->getRepository();
	+
	+ // For fully imported repositories "$n - 1" assumption is always correct.
	+ $subpath = $repository->getDetail('svn-subpath');
	+ if (!strlen($subpath)) {
	+ return $ids;
	+ }
	+
	+ list($xml) = $repository->execxRemoteCommand(
	+ 'log %s --xml --revision %d:1 --limit 1',
	+ $repository->getSubversionBaseURI(),
	+ head($ids));
	+
	+ $log = new SimpleXMLElement($xml);
	+
	+ return array((int)$log->logentry['revision']);
	}

	}