fix

core/src/data_lookup/compact.rs

@@ -42,14 +42,21 @@ pub struct CompactDataLookup {
 
 impl CompactDataLookup {
 	pub fn from_expanded(lookup: &DataLookup) -> Self {
-		let index = lookup
-			.index
-			.iter()
-			.filter(|(id, _)| *id != AppId(0))
-			.map(|(id, range)| DataLookupItem::new(*id, range.start))
-			.collect();
-		let size = lookup.index.last().map_or(0, |(_, range)| range.end);
-		Self { size, index }
+		if lookup.is_error {
+			CompactDataLookup {
+				size: u32::MAX,
+				index: Vec::default(),
+			}
+		} else {
+			let index = lookup
+				.index
+				.iter()
+				.filter(|(id, _)| *id != AppId(0))
+				.map(|(id, range)| DataLookupItem::new(*id, range.start))
+				.collect();
+			let size = lookup.index.last().map_or(0, |(_, range)| range.end);
+			Self { size, index }
+		}
 	}
 }
 

core/src/data_lookup/mod.rs

@@ -119,14 +119,15 @@ impl DataLookup {
 		})
 	}
 
-	/// This function is only used when something has gone wrong during header extension building
+	/// This function is used a block contains no data submissions.
 	pub fn new_empty() -> Self {
 		Self {
 			index: Vec::new(),
 			is_error: false,
 		}
 	}
 
+	/// This function is only used when something has gone wrong during header extension building
 	pub fn new_error() -> Self {
 		Self {
 			index: Vec::new(),
@@ -139,6 +140,10 @@ impl TryFrom<CompactDataLookup> for DataLookup {
 	type Error = Error;
 
 	fn try_from(compacted: CompactDataLookup) -> Result<Self, Self::Error> {
+		if compacted.size == u32::MAX {
+			return Ok(DataLookup::new_error());
+		}
+
 		let mut offset = 0;
 		let mut prev_id = AppId(0);
 		let mut index = Vec::with_capacity(