fixed bug where active tab index could be bigger than the data array …

…that holds it

gui/src/lib.rs

@@ -217,8 +217,15 @@ impl Application for Blaze {
                     pane_state.active_tab_index = 0;
                 }
 
+                // current we arent removing the data from the program, just removing it from being visable. This is a memory leak
                 pane_state.data.remove(id);
-                // current we arent removing the data from the program, just removing it from being visable
+
+                // set the new active tab index
+                if pane_state.data.is_empty() {
+                    pane_state.active_tab_index = 0;
+                } else {
+                    pane_state.active_tab_index = pane_state.data.len() - 1;
+                }
             }
 
             Message::PaneDragged(DragEvent::Dropped { pane, target }) => {

gui/src/widgets/tab_bar.rs

@@ -50,7 +50,7 @@ fn head(active: usize, data: &[&Buffer]) -> TabBar<Message, usize, Theme, Render
 }
 
 fn body<'a>(active: usize, data: &[&'a Buffer]) -> Element<'a, Message> {
-    let active_tab = data.get(active).unwrap(); //wrong
+    let active_tab = data.get(active).expect("There is no active tab");
 
     match active_tab {
         Buffer::File(file_buffer) => text_editor(&file_buffer.content)