From 217b6cfa6017427a5afbb6d9655ef2e868dbb5da Mon Sep 17 00:00:00 2001
From: John T Maxwell III <maxwellparc@gmail.com>
Date: Mon, 30 Sep 2024 04:04:26 -0700
Subject: [PATCH] Fix original LT-20351 (#248)

---
 src/SIL.Machine/FiniteState/Fst.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SIL.Machine/FiniteState/Fst.cs b/src/SIL.Machine/FiniteState/Fst.cs
index fbec0291e..f56d8f86d 100644
--- a/src/SIL.Machine/FiniteState/Fst.cs
+++ b/src/SIL.Machine/FiniteState/Fst.cs
@@ -368,7 +368,7 @@ out IEnumerable<FstResult<TData, TOffset>> results
             int annIndex = traversalMethod.Annotations.IndexOf(start);
 
             var initAnns = new HashSet<int>();
-            while (annIndex < traversalMethod.Annotations.Count)
+            while (annIndex < traversalMethod.Annotations.Count && annIndex > -1)
             {
                 var initRegisters = new Register<TOffset>[_registerCount, 2];