From a342e6a10145f86696db411b9b76d0f53ce202cc Mon Sep 17 00:00:00 2001
From: cheme <emericchevalier.pro@gmail.com>
Date: Tue, 4 Oct 2022 15:10:44 +0200
Subject: [PATCH] Don't allow bitmap without children.

---
 test-support/reference-trie/src/lib.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/test-support/reference-trie/src/lib.rs b/test-support/reference-trie/src/lib.rs
index 2356e104..df58794a 100644
--- a/test-support/reference-trie/src/lib.rs
+++ b/test-support/reference-trie/src/lib.rs
@@ -133,7 +133,11 @@ const BITMAP_LENGTH: usize = 2;
 
 impl Bitmap {
 	fn decode(data: &[u8]) -> Result<Self, CodecError> {
-		Ok(u16::decode(&mut &data[..]).map(|v| Bitmap(v))?)
+		let value = u16::decode(&mut &data[..])?;
+		if value == 0 {
+			return Err(CodecError::from("Bad format"))
+		}
+		Ok(Bitmap(value))
 	}
 
 	fn value_at(&self, i: usize) -> bool {