From 63b6b09a6cbab4446f42b5b7a8c85e6109cac9f6 Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Thu, 11 May 2017 15:37:05 +1000
Subject: src/lvm.js: Setting nil should delete from table

Closes #37
---
 src/lvm.js       | 10 ++++++++--
 tests/ltablib.js |  2 +-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/lvm.js b/src/lvm.js
index 0d30484..4484bf2 100644
--- a/src/lvm.js
+++ b/src/lvm.js
@@ -1079,7 +1079,10 @@ const settable = function(L, table, key, v, recur) {
         let element = ltable.luaH_set(table.value, key);
 
         if (!element.ttisnil()) {
-            element.setfrom(v);
+            if (v.ttisnil())
+                ltable.luaH_delete(table.value, key);
+            else
+                element.setfrom(v);
         } else {
             luaV_finishset(L, table, key, v, element, recur);
         }
@@ -1094,7 +1097,10 @@ const luaV_finishset = function(L, t, key, val, slot, recur) {
         assert(slot.ttisnil());
         tm = ltm.luaT_gettmbyobj(L, t, ltm.TMS.TM_NEWINDEX); // TODO: fasttm
         if (tm.ttisnil()) {
-            slot.setfrom(val);
+            if (val.ttisnil())
+                ltable.luaH_delete(t.value, key);
+            else
+                slot.setfrom(val);
             return;
         }
     } else { /* not a table; check metamethod */
diff --git a/tests/ltablib.js b/tests/ltablib.js
index 8789f9e..e209db3 100644
--- a/tests/ltablib.js
+++ b/tests/ltablib.js
@@ -184,7 +184,7 @@ test('table.remove', function (t) {
         [...lua.lua_topointer(L, -1).strong.entries()]
             .filter(e => typeof e[0] === 'number')
             .map(e => e[1].value.value).sort(),
-        [1, 2, 3, 4, null, null],
+        [1, 2, 3, 4],
         "Correct element(s) on the stack"
     );
 });
-- 
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