Replace most panics in the core library with results

src/dynamic_data/flow/choice_queue.rs

@@ -160,6 +160,7 @@ impl ValueIdentifiable for ChoiceQueue {
 
 #[cfg(test)]
 #[allow(clippy::unwrap_used)]
+#[allow(clippy::indexing_slicing)]
 mod tests {
     use super::*;
     use crate::defines::LevelInt;