Disable is_bound() check for Godot 4.0 due to UB

Author: Bromeon

godot-core/src/storage.rs

@@ -343,6 +343,9 @@ pub unsafe fn as_storage<'u, T: GodotClass>(
 pub unsafe fn destroy_storage<T: GodotClass>(instance_ptr: sys::GDExtensionClassInstancePtr) {
     let raw = instance_ptr as *mut InstanceStorage<T>;
 
+    // The following caused UB in 4.0.4 itests, only on Linux. Debugging was not conclusive; would need more time.
+    // Since it doesn't occur in 4.1+, we disable it -- time can be spent better on newer versions.
+    #[cfg(since_api = "4.1")]
     assert!(
         !(*raw).is_bound(),
         "tried to destroy object while a bind() or bind_mut() call is active\n  \

itest/rust/src/object_tests/object_test.rs

@@ -268,6 +268,7 @@ fn object_user_free_during_bind() {
     obj.free(); // now succeeds
 }
 
+#[cfg(since_api = "4.1")] // See destroy_storage() comment.
 #[itest]
 fn object_user_dynamic_free_during_bind() {
     // Note: we could also test if GDScript can access free() when an object is bound, to check whether the panic is handled or crashes