A bunch more work on replacing every potential panic with results

src/static_data/libraries/data_library.rs

@@ -1,3 +1,4 @@
+use anyhow_ext::Result;
 use std::sync::Arc;
 
 use indexmap::IndexMap;
@@ -48,8 +49,11 @@ pub trait DataLibrary<T: ?Sized> {
     }
 
     /// Gets a random value from the library.
-    fn random_value(&self, rand: &mut Random) -> &Arc<T> {
+    fn random_value(&self, rand: &mut Random) -> Result<&Arc<T>> {
         let i = rand.get_between(0, self.len() as i32);
-        return self.map().get_index(i as usize).unwrap().1;
+        match self.map().get_index(i as usize) {
+            Some(v) => Ok(v.1),
+            None => anyhow::bail!("No value found for index {}", i),
+        }
     }
 }