fix clone not changing the root

Previously cloning a node does not alter the root of the forest, while
it should alter the root if the cloned node was the root.  This would
affect how we compare the equalities of forests.  It indeed resulted
in anomalies that were hard to solve.

1 files changed, 7 insertions, 6 deletions

diff --git a/chain/src/item/default/splone.rs b/chain/src/item/default/splone.rs
index 1168539..4f4835b 100644
--- a/chain/src/item/default/splone.rs
+++ b/chain/src/item/default/splone.rs
@@ -1,3 +1,4 @@
+#![allow(dead_code)]
 //! This module implements a function for "closing" and "splitting" a
 //! node in a forest, and hence the name.
 
@@ -595,6 +596,12 @@ mod test_splone {
 
         forest.plant(
             cloned,
+            leaf!(GrammarLabel::new_closed(6, 0, 1), GrammarLabel),
+            true,
+        )?;
+
+        forest.plant(
+            cloned,
             leaf!(GrammarLabel::new_closed(7, 1, 3), GrammarLabel),
             false,
         )?;
@@ -605,12 +612,6 @@ mod test_splone {
             false,
         )?;
 
-        forest.plant(
-            cloned,
-            leaf!(GrammarLabel::new_closed(6, 0, 1), GrammarLabel),
-            true,
-        )?;
-
         let mut builder = PLGBuilderMut::from_graph_mut(&mut forest.graph);
 
         let dummy_label = ForestLabel::from(GrammarLabel::new(0, 0));