Bug 53299 Synchronizing 5 projects is locking too much
Build 20040219 While synchronizing 5 projects, I started editing one file in project no.1, while no.3 was being synchronized (1 was long done). I still got locked on validate edit, though the project 1 should have been released from the sync rsc lock. (I did check that no other competing job was getting in the way)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/filebuffers/CompilationUnitDocumentProvider2.java
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 (fIncludesProblemAnnotationChanges) {
					try {
						if (fCompilationUnit != null)
							fCompilationUnit.reconcile(true, null);
					} catch (JavaModelException ex) {
						if (!ex.isDoesNotExist())
							handleCoreException(ex, ex.getMessage());
					}
				}
			}
			
			/*
			 * @see IProblemRequestor#beginReporting()
			 */
			public void beginReporting() {
			}