Bug 90528 Editor icon does not show problem decoration for second instance
3.1 M6 - open a .java file that has errors or warnings - the editor tab icon has the problem decoration - Window > New Window - open the same file in the new window - the editor tab icon is missing the problem decoration
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
return new ExitFlags(ILinkedModeListener.UPDATE_CARET, false);
				}
			}
			return null;
		}
			
		private boolean isMasked(int offset) {
			IDocument document= getSourceViewer().getDocument();
			try {
				return fEscapeCharacter == document.getChar(offset - 1);
			} catch (BadLocationException e) {
			}
			return false;
		}
	}
	
	private static class BracketLevel {
		int fOffset;
		int fLength;
		LinkedModeUI fUI;
		Position fFirstPosition;
		Position fSecondPosition;
	}
	
	/**
	 * Position updater that takes any changes at the borders of a position to not belong to the position.
	 * 
	 * @since 3.0
	 */
	private static class ExclusivePositionUpdater implements IPositionUpdater {