From 8ecfc735bf92b702f699500f939939afe01eb62d Mon Sep 17 00:00:00 2001
From: nnposter <nnposter@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Wed, 4 Feb 2026 01:05:47 +0000
Subject: [PATCH] Boolean values are legitimate keys

---
 nselib/tableaux.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nselib/tableaux.lua b/nselib/tableaux.lua
index 6a748cc66..657a1cf45 100644
--- a/nselib/tableaux.lua
+++ b/nselib/tableaux.lua
@@ -41,7 +41,7 @@ tcopy_local = tcopy
 function shallow_tcopy(t)
   local k = next(t)
   local out = {}
-  while k do
+  while k ~= nil do
     out[k] = t[k]
     k = next(t, k)
   end