--- a/cdt/cdt_6_0_x/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/sourcelookup/CSourceLookupParticipant.java	Fri Aug 07 07:23:15 2009 -0500
+++ b/cdt/cdt_6_0_x/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/sourcelookup/CSourceLookupParticipant.java	Fri Aug 07 08:05:16 2009 -0500
@@ -15,6 +15,9 @@
 package org.eclipse.cdt.debug.internal.core.sourcelookup; 
 
 import java.io.File;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
 
 import org.eclipse.cdt.debug.core.cdi.ICDIBreakpointHit;
 import org.eclipse.cdt.debug.core.model.ICDebugTarget;
@@ -48,6 +51,8 @@
 	private static final NoSourceElement gfNoSource = new NoSourceElement();
 
 	private ListenerList fListeners;
+	
+	private Map<Object, Object[]> fCachedResults = Collections.synchronizedMap(new HashMap<Object, Object[]>());
 
 	/** 
 	 * Constructor for CSourceLookupParticipant. 
@@ -78,6 +83,11 @@
 	 * @see org.eclipse.debug.core.sourcelookup.AbstractSourceLookupParticipant#findSourceElements(java.lang.Object)
 	 */
 	@Override
+		// Check the cache
+		Object[] results = fCachedResults.get(object);
+		if (results != null)
+			return results;
+		
 	public Object[] findSourceElements( Object object ) throws CoreException {
 
 		// Workaround for BUG247977
@@ -94,9 +104,11 @@
 				if ( name == null || name.length() == 0 )
 				{
 					if (object instanceof IDebugElement)
-						return new Object[] { new CSourceNotFoundElement( (IDebugElement) object ) };
+						results = new Object[] { new CSourceNotFoundElement( (IDebugElement) object ) };
 					else
-						return new Object[] { gfNoSource };					
+						results = new Object[] { gfNoSource };
+					fCachedResults.put(object, results);
+					return results;
 				}
 			}
 			// See if findSourceElements(...) is the result of a Breakpoint Hit Event
@@ -112,6 +124,7 @@
 			name = (String)object;
 		}
 
+		fCachedResults.put(object, foundElements);
 		// Actually query the source containers for the requested resource
 		Object[] foundElements = super.findSourceElements(object);
 

--- a/foo.txt	Fri Aug 07 07:23:15 2009 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,48 +0,0 @@
-# HG changeset patch
-# User ryall
-# Date 1249412413 18000
-# Node ID fcb77f9783d2c410f5e70d8859fd004c67d10b0c
-# Parent  e82f98a34bed4d769138c63f4c80d8b603593126
-Fix NPEs.
-
-diff -r e82f98a34bed -r fcb77f9783d2 cdt/cdt_6_0_x/org.eclipse.cdt.launch/src/org/eclipse/cdt/launch/ui/CMainTab.java
---- a/cdt/cdt_6_0_x/org.eclipse.cdt.launch/src/org/eclipse/cdt/launch/ui/CMainTab.java	Tue Aug 04 13:42:53 2009 -0500
-+++ b/cdt/cdt_6_0_x/org.eclipse.cdt.launch/src/org/eclipse/cdt/launch/ui/CMainTab.java	Tue Aug 04 14:00:13 2009 -0500
-@@ -493,13 +493,16 @@
- 	}
- 
- 	protected void updateProgramFromConfig(ILaunchConfiguration config) {
--		String programName = EMPTY_STRING;
--		try {
--			programName = config.getAttribute(ICDTLaunchConfigurationConstants.ATTR_PROGRAM_NAME, EMPTY_STRING);
--		} catch (CoreException ce) {
--			LaunchUIPlugin.log(ce);
-+		if (fProgText != null)
-+		{
-+			String programName = EMPTY_STRING;
-+			try {
-+				programName = config.getAttribute(ICDTLaunchConfigurationConstants.ATTR_PROGRAM_NAME, EMPTY_STRING);
-+			} catch (CoreException ce) {
-+				LaunchUIPlugin.log(ce);
-+			}
-+			fProgText.setText(programName);
- 		}
--		fProgText.setText(programName);
- 	}
- 
- 	/** @since 6.0 */
-@@ -546,8 +549,12 @@
- 			config.setMappedResources(null);
- 		}
- 		config.setAttribute(ICDTLaunchConfigurationConstants.ATTR_PROJECT_NAME, fProjText.getText());
--		config.setAttribute(ICDTLaunchConfigurationConstants.ATTR_PROJECT_BUILD_CONFIG_ID, (String)fBuildConfigCombo.getData(Integer.toString(fBuildConfigCombo.getSelectionIndex())));
--		config.setAttribute(ICDTLaunchConfigurationConstants.ATTR_PROGRAM_NAME, fProgText.getText());
-+		if (fBuildConfigCombo != null) {
-+			config.setAttribute(ICDTLaunchConfigurationConstants.ATTR_PROJECT_BUILD_CONFIG_ID, (String)fBuildConfigCombo.getData(Integer.toString(fBuildConfigCombo.getSelectionIndex())));
-+		}
-+		if (fProgText != null) {
-+			config.setAttribute(ICDTLaunchConfigurationConstants.ATTR_PROGRAM_NAME, fProgText.getText());
-+		}
- 		if (fCoreText != null) {
- 			config.setAttribute(ICDTLaunchConfigurationConstants.ATTR_COREFILE_PATH, fCoreText.getText());
- 		}