Bug 122505 [build path] Can't exclude folder if exclusion pattern disabled on project/workspace level
Version: 3.2.0 Build id: I20051220-0800 Create project with inclusion and exclusion patters disabled and no seperate src and output folder. On build path menu select 'New Source Folder' The wizard shows the error: Cannot nest 'P03/src' inside 'P03'. To enable the nesting exclude 'src/' from 'P03' But the check box is disabled (which is correct). The error should say something else.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/AddSourceFolderWizardPage.java
if (res.getType() != IResource.FOLDER) {
				result.setError(NewWizardMessages.NewSourceFolderWizardPage_error_NotAFolder); 
				return result;
			}
		} else {
			
			URI projLocation= project.getLocationURI();
			if (projLocation != null) {
				try {
					IFileStore store= EFS.getStore(projLocation).getChild(str);
					if (store.fetchInfo().exists()) {
						result.setError(NewWizardMessages.NewSourceFolderWizardPage_error_AlreadyExistingDifferentCase); 
						return result;
					}
				} catch (CoreException e) {
					
					
					
				}
			}
		}
		
		return result;
	}
	
	private void addExclusionPatterns(CPListElement newEntry, List existing, Set modifiedEntries) {
		IPath entryPath= newEntry.getPath();
		for (int i= 0; i < existing.size(); i++) {
			CPListElement curr= (CPListElement) existing.get(i);
			IPath currPath= curr.getPath();