Bug 40347 [misc] Renaming a project with an open editor fills log
I20030716+plugin-export 1) have a Java file open in the Java editor 2) rename the enclosing project -> exception in log but no stacktrace
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitDocumentProvider.java
protected Position createPositionFromProblem(IProblem problem) {
				int start= problem.getSourceStart();
				if (start < 0)
					return null;
					
				int length= problem.getSourceEnd() - problem.getSourceStart() + 1;
				if (length < 0)
					return null;
					
				return new Position(start, length);
			}
			protected void update(IMarkerDelta[] markerDeltas) {
	
				super.update(markerDeltas);
				if (markerDeltas != null && markerDeltas.length > 0) {
					try {
						ICompilationUnit workingCopy = getWorkingCopy(fInput);
						if (workingCopy != null)
							workingCopy.reconcile(true, null);
					} catch (JavaModelException ex) {
						handleCoreException(ex, ex.getMessage());
					}
				}
			}
			
			/*
			 * @see IProblemRequestor#beginReporting()
			 */
			public void beginReporting() {
				ICompilationUnit unit= getWorkingCopy(fInput);