Start drop specialisation for joinpoints

crates/compiler/test_mono/src/tests.rs

@@ -3076,6 +3076,29 @@ fn record_update() {
     )
 }
 
+#[mono_test]
+fn drop_specialize_after_jump() {
+    indoc!(
+        r#"
+        app "test" provides [main] to "./platform"
+
+        Tuple a b : { left : a, right : b }
+
+        main =
+            v = "value"
+            t = { left: { left: v, right: v }, right: v }
+            tupleItem t
+        
+        tupleItem = \t ->
+            true = Bool.true
+            l = t.left
+            x = if true then 1 else 0
+            ll = l.left
+            { left: t, right: ll}
+        "#
+    )
+}
+
 #[mono_test(mode = "test")]
 fn dbg_in_expect() {
     indoc!(