Drop and terminate debugger

helix-term/src/application.rs

@@ -187,6 +187,9 @@ impl Application {
                     }
                 }
                 Some(payload) = self.editor.debugger_events.next() => {
+                    if self.editor.debugger.is_none() {
+                        continue;
+                    }
                     let mut debugger = self.editor.debugger.as_mut().unwrap();
                     match payload {
                         Payload::Event(ev) => {

helix-term/src/commands.rs

@@ -4329,5 +4329,6 @@ fn dap_terminate(cx: &mut Context) {
     if let Some(debugger) = &mut cx.editor.debugger {
         let request = debugger.disconnect();
         let _ = block_on(request).unwrap();
+        cx.editor.debugger = None;
     }
 }