Fix early drop of eventhandlers (#2126)

* fix early drop of eventhandlers

* add a test for stale props that are memorized in place

* fix clippy

packages/check/src/check.rs

@@ -37,6 +37,7 @@ pub fn check_file(path: PathBuf, file_content: &str) -> IssueReport {
     )
 }
 
+#[allow(unused)]
 #[derive(Debug, Clone)]
 enum Node {
     If(IfInfo),