From 31ff62445bd017ddc4fed5547e5e75248f4649d6 Mon Sep 17 00:00:00 2001
From: Will Lillis <will.lillis24@gmail.com>
Date: Tue, 16 Sep 2025 03:23:22 -0400
Subject: [PATCH] fix(generate): assert there is a Nfa last state before
 retrieving it

Prevents unsigned subtraction wrapping antics in release builds
---
 crates/generate/src/nfa.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/generate/src/nfa.rs b/crates/generate/src/nfa.rs
index 9a63cb97..eecbc40b 100644
--- a/crates/generate/src/nfa.rs
+++ b/crates/generate/src/nfa.rs
@@ -434,6 +434,7 @@ impl Nfa {
     }
 
     pub fn last_state_id(&self) -> u32 {
+        assert!(!self.states.is_empty());
         self.states.len() as u32 - 1
     }
 }