Bug 175664 [Mac] Unexpected internal exception occurs when invoke expression builder
Description: There are two problems: 1. "fx" button (Click this button to invoke Expression Builder) could not be displayed correctly, nothing displayed in the button. 2. Click on the button, an unexpected internal exception occurs. Version:2.2.0.v20070205 Steps to reproduce: 1.Insert a Data item to the layout. Click "fx" button to invoke the expression builder, although on Mac "fx" button could not display correctly. Error log: Argument cannot be null Plug-in Provider: Eclipse.org Plug-in Name: BIRT Designer UI Plug-in ID: org.eclipse.birt.report.designer.ui Error Code: Error.GUIException.invokedByUnexpectedException Error Message:Argument cannot be null
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
{
				IPath path = folderHandle.getFullPath( );
				IWorkspaceRoot root = ResourcesPlugin.getWorkspace( ).getRoot( );
				int numSegments = path.segmentCount( );
				if ( numSegments > 2
						&& !root.getFolder( path.removeLastSegments( 1 ) )
								.exists( ) )
				{
					
					
					
					for ( int i = numSegments - 2; i > 0; i-- )
					{
						IFolder folder = root.getFolder( path.removeLastSegments( i ) );
						if ( !folder.exists( ) )
						{
							folder.create( false, true, monitor );
						}
					}
				}
				folderHandle.create( false, true, monitor );
			}
		}
		catch ( CoreException e )
		{
			
			
			if ( e.getStatus( ).getCode( ) == IResourceStatus.PATH_OCCUPIED )
				folderHandle.refreshLocal( IResource.DEPTH_INFINITE,
						new SubProgressMonitor( monitor, 500 ) );