From 0eb210933e8cfed9742cb7f901b6880af8645971 Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@sixtyfps.io>
Date: Fri, 5 Nov 2021 11:34:41 +0100
Subject: [PATCH] Fix itreem tree offsets of children of chained sub-components

Similar to commit 4eb161b83fa9ced0c6f8262846fc6c0e9b422212 this works in C++
by accident but for Rust to compile we need to advance the sub-component
state in the tree builder.
---
 sixtyfps_compiler/generator.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sixtyfps_compiler/generator.rs b/sixtyfps_compiler/generator.rs
index 16e9538d3..fecdd107c 100644
--- a/sixtyfps_compiler/generator.rs
+++ b/sixtyfps_compiler/generator.rs
@@ -221,8 +221,14 @@ pub fn build_item_tree<T: ItemTreeBuilder>(
         // detect and chain the children visitation.
         if children.is_empty() {
             if let Some(nested_subcomponent) = parent_item.borrow().sub_component() {
-                visit_children(
+                let sub_component_state = builder.enter_component(
+                    parent_item,
+                    nested_subcomponent,
+                    children_offset,
                     state,
+                );
+                visit_children(
+                    &sub_component_state,
                     &nested_subcomponent.root_element.borrow().children,
                     &nested_subcomponent,
                     &nested_subcomponent.root_element,