Merge branch 'stable-4.5'

* origin/stable-4.5:
  Fix one case of missing object

Change-Id: Ia6384f4be71086d5a0a8c42c7521220f57dfd086
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/GC.java

 			return;
 
 		// delete all candidates which have survived: these are unreferenced
-		// loose objects
-		for (File f : deletionCandidates.values())
-			f.delete();
+		// loose objects. Make a last check, though, to avoid deleting objects
+		// that could have been referenced while the candidates list was being
+		// built (by an incoming push, for example).
+		for (File f : deletionCandidates.values()) {
+			if (f.lastModified() < expireDate) {
+				f.delete();
+			}
+		}
 
 		repo.getObjectDatabase().close();
 	}