Bug 73769 [Dialogs] Open Resource dialog has OK enabled when entry invalid
3.0.1 RC2 - Ctrl+Shift+R - type: WorkbenchWino (note the missing d) and hit Enter - the dialog is dismissed with no action Should disable OK if there is no match.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/ResourceListSelectionDialog.java
return;
                                updateItem(index, itemIndex[0], itemCount[0]);
                                itemIndex[0]++;
                            }
                        });
                    }
                }
            }
            if (disposed[0])
                return;
            lastMatch = last;
            display.syncExec(new Runnable() {
                public void run() {
                    if (resourceNames.isDisposed())
                        return;
                    itemCount[0] = resourceNames.getItemCount();
                    if (itemIndex[0] < itemCount[0]) {
                        resourceNames.setRedraw(false);
                        resourceNames.remove(itemIndex[0], itemCount[0] - 1);
                        resourceNames.setRedraw(true);
                    }
                    
                    if (resourceNames.getItemCount() == 0) {
                        folderNames.removeAll();
                    }
                }
            });
        }
    };
    class UpdateGatherThread extends Thread {