A bunch more work on replacing every potential panic with results

src/static_data/growth_rates.rs

@@ -1,4 +1,5 @@
 use crate::defines::LevelInt;
+use crate::VecExt;
 use anyhow::Result;
 use anyhow_ext::ensure;
 
@@ -37,9 +38,12 @@ impl GrowthRate for LookupGrowthRate {
     fn calculate_experience(&self, level: LevelInt) -> Result<u32> {
         ensure!(level > 0, "Level must be greater than 0, but was {}", level);
         if level >= self.experience.len() as LevelInt {
-            Ok(*self.experience.last().unwrap())
+            match self.experience.last() {
+                Some(v) => Ok(*v),
+                None => anyhow::bail!("No experience values found"),
+            }
         } else {
-            Ok(self.experience[(level - 1) as usize])
+            Ok(*self.experience.get_res((level - 1) as usize)?)
         }
     }
 }

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),
+        }
     }
 }