Fix delete uncalled bugs

hercules_opt/src/delete_uncalled.rs

@@ -50,6 +50,11 @@ pub fn delete_uncalled(
     // that all nodes in all functions will be mutable, so panic if any
     // edit fails.
     for editor in editors.iter_mut() {
+        // Don't make edits to dead functions as they may include calls to dead functions
+        if new_idx[editor.func_id().idx()].is_none() {
+            continue;
+        }
+
         let callsites: Vec<_> = editor
             .node_ids()
             .filter(|id| editor.func().nodes[id.idx()].is_call())

juno_utils/src/env.rs

@@ -2,6 +2,7 @@ use std::collections::HashMap;
 use std::collections::HashSet;
 use std::hash::Hash;
 
+#[derive(Debug)]
 pub struct Env<K, V> {
     table: HashMap<K, Vec<V>>,
     scope: Vec<HashSet<K>>,
@@ -98,6 +99,11 @@ impl<K: Eq + Hash + Copy, V> Env<K, V> {
         let mut new_scopes: HashMap<K, Vec<usize>> = HashMap::new();
 
         for (k, vs) in std::mem::take(&mut self.table) {
+            if vs.is_empty() {
+                assert!(!scopes.contains_key(&k));
+                continue;
+            }
+
             let scope_list = scopes.remove(&k).unwrap();
             assert!(scope_list.len() == vs.len());