Bug 345761 - While stepping over a long-running operation another thread can steal selection in Debug view.

org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/update/DefaultSelectionPolicy.java

diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/update/DefaultSelectionPolicy.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/update/DefaultSelectionPolicy.java
index a19cf97..424bfd9 100644
--- a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/update/DefaultSelectionPolicy.java
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/update/DefaultSelectionPolicy.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2005, 2009 IBM Corporation and others.
+ * Copyright (c) 2005, 2011 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -102,7 +102,7 @@
 	protected boolean isSticky(Object element) {
 		if (element instanceof IStackFrame) {
 			IStackFrame frame = (IStackFrame) element;
-			return frame.isSuspended();
+			return frame.isSuspended() || frame.isStepping();
 		}
 		return false;
 	}