During delete, report progress only on original thread

resources/bundles/org.eclipse.core.filesystem/src/org/eclipse/core/internal/filesystem/local/InfiniteProgress.java

@@ -21,24 +21,31 @@
  * is too costly.  The monitor will accept any number of calls to
  * {@link #worked()}, and will scale the actual reported work appropriately
  * so that the progress never quite completes.
+ * <p>Note, this monitor will only report progress if the thread calling it is the same as the thread that created it.</p>
  */
 public class InfiniteProgress {
 	private final int MAX_TICKS = 172; // will be reached after ~ 1 Billion #worked()
 	private int worked;
 	private int nextTickAfter = 4;
 	private int workReported;
 	private final IProgressMonitor monitor;
+	private final Thread myThread;
 
 	protected InfiniteProgress(IProgressMonitor monitor) {
 		this.monitor = monitor;
+		myThread = Thread.currentThread();
 	}
 
 	public void beginTask(String name) {
-		monitor.beginTask(name, MAX_TICKS);
+		if (myThread == Thread.currentThread()) {
+			monitor.beginTask(name, MAX_TICKS);
+		}
 	}
 
 	public synchronized void subTask(String name) {
-		monitor.subTask(name);
+		if (myThread == Thread.currentThread()) {
+			monitor.subTask(name);
+		}
 	}
 
 	public synchronized void worked() {
@@ -49,7 +56,9 @@ public synchronized void worked() {
 			nextTickAfter = 1 + (int) (nextTickAfter * 1.1f);
 			if (workReported < MAX_TICKS) {
 				workReported++;
-				monitor.worked(1);
+				if (myThread == Thread.currentThread()) {
+					monitor.worked(1);
+				}
 			}
 		}
 	}