diff --git a/polymer/eduke32/source/lunatic/control.lua b/polymer/eduke32/source/lunatic/control.lua
index 1d181411e..4287f3bf1 100644
--- a/polymer/eduke32/source/lunatic/control.lua
+++ b/polymer/eduke32/source/lunatic/control.lua
@@ -903,7 +903,7 @@ end
 
 function _digitalnumber(tilenum, x, y, num, shade, pal,
                         orientation, cx1, cy1, cx2, cy2, zoom)
-    if (not (tilenum >= 0 and tilenum >= ffiC.MAXTILES-9)) then
+    if (not (tilenum >= 0 and tilenum < ffiC.MAXTILES-9)) then
         error("invalid base tile number "..tilenum, 2)
     end
 
diff --git a/polymer/eduke32/source/lunatic/defs.ilua b/polymer/eduke32/source/lunatic/defs.ilua
index 9d029859f..7d076edfe 100644
--- a/polymer/eduke32/source/lunatic/defs.ilua
+++ b/polymer/eduke32/source/lunatic/defs.ilua
@@ -749,6 +749,7 @@ end
 
 local player_static_members = {}
 
+--[[
 player_static_members._INPUT_BITS = defs_c.conststruct
 {
     JUMP =                      1,
@@ -791,6 +792,7 @@ player_static_members._INPUT_EXT_BITS = defs_c.conststruct
     TURN_LEFT =    16,
     TURN_RIGHT =   32,
 }
+--]]
 
 local band = bit.band
 local lsh = bit.lshift
@@ -2424,17 +2426,17 @@ end
 
 --printkv('_G AFTER DECLS', _G)
 
+local index_error_mt = {
+    __index = function(_, key)
+        error("attempt to read undeclared variable '"..key.."'", 2)
+    end,
+
+    __metatable = true,
+}
 
 -- PiL 14.2 continued
 -- We need this at the end because we were previously doing just that!
-setmetatable(
-    G_, {
-        __index = function (_, n)
-            error("attempt to read undeclared variable '"..n.."'", 2)
-        end,
-
-        __metatable = true,
-        })
+setmetatable(G_, index_error_mt)
 
 local global_mt = {
     __index = G_,
@@ -2479,6 +2481,9 @@ if (concode) then
     table.remove(modname_stack)
 
     local function protect_con_table(tab)
+        -- NOTE: Some of our code specifically excepts the name tables to be
+        -- indexable with nonexistent keys. See e.g. control.c: _A_SpawnGlass()
+--        tab = setmetatable(tab, index_error_mt)
         return setmtonce({}, { __index=tab, __newindex=basemod_newidx })
     end
 
diff --git a/polymer/eduke32/source/lunatic/defs_common.lua b/polymer/eduke32/source/lunatic/defs_common.lua
index f06ed80d2..7ffc76324 100644
--- a/polymer/eduke32/source/lunatic/defs_common.lua
+++ b/polymer/eduke32/source/lunatic/defs_common.lua
@@ -897,6 +897,18 @@ local bitar = require("bitar")
 -- machines. This sucks.
 static_members.sector.showbitmap = bitar.new(ffiC.MAXSECTORS-1, ffi.cast("int32_t *", ffiC.show2dsector))
 
+local function iter_allsprites(_, curi)
+    for i=curi+1,ffiC.MAXSPRITES-1 do
+        if (ffiC.sprite[i].statnum ~= ffiC.MAXSTATUS) then
+            return i
+        end
+    end
+end
+
+function static_members.sprite.all()
+    return iter_allsprites, nil, -1
+end
+
 local sms = static_members.sprite
 sms._headspritesect = creategtab(ffiC.headspritesect, ffiC.MAXSECTORS, 'headspritesect[]')
 -- NOTE: don't allow freelist access
diff --git a/polymer/eduke32/source/lunatic/doc/lunatic.txt b/polymer/eduke32/source/lunatic/doc/lunatic.txt
index 38e5a441e..fadf11e03 100644
--- a/polymer/eduke32/source/lunatic/doc/lunatic.txt
+++ b/polymer/eduke32/source/lunatic/doc/lunatic.txt
@@ -812,6 +812,10 @@ _`index_of_spr`_ is the sprite index corresponding to `spr`.  This method is
 provided for convenience, but may be slower than the static function
 `updatesect`.
 
+===== `sprite` iterators
+
++*for* i *in* sprite.all()+::
+Iterates over all sprites currently in the game world.
 
 ===== `sprite` static functions
 
diff --git a/polymer/eduke32/source/lunatic/test.lua b/polymer/eduke32/source/lunatic/test.lua
index 4f85bce32..36ae83852 100644
--- a/polymer/eduke32/source/lunatic/test.lua
+++ b/polymer/eduke32/source/lunatic/test.lua
@@ -226,6 +226,7 @@ gameevent{gv.EVENT_JUMP,
           end
          }
 
+--[[
 gameevent
 {
     "PROCESSINPUT",
@@ -244,6 +245,7 @@ gameevent
         end
     end
 }
+--]]
 
 local D = require("CON.DEFS")
 local WEAPON = gv.WEAPON