use List.copyOf() to return results

Vladimir Kotal · Vladimir Kotal · commit 21090480e028 · 2021-05-19T20:04:25.000+02:00
diff --git a/opengrok-indexer/src/main/java/org/opengrok/indexer/history/BoundaryChangesets.java b/opengrok-indexer/src/main/java/org/opengrok/indexer/history/BoundaryChangesets.java
@@ -82,7 +82,7 @@ public synchronized List<String> getBoundaryChangesetIDs(String sinceRevision) t
                 String.format("done getting boundary changesets for ''%s'' (%d entries)",
                         repository.getDirectoryName(), result.size()));
 
-        return result;
+        return List.copyOf(result);
     }
 
     private void visit(String id) {

Original file line number	Diff line number	Diff line change
`@@ -82,7 +82,7 @@ public synchronized List<String> getBoundaryChangesetIDs(String sinceRevision) t`
`82`	`82`	`String.format("done getting boundary changesets for ''%s'' (%d entries)",`
`83`	`83`	`repository.getDirectoryName(), result.size()));`
`84`	`84`
`85`		`- return result;`
	`85`	`+ return List.copyOf(result);`
`86`	`86`	`}`
`87`	`87`
`88`	`88`	`private void visit(String id) {`