Update

Kha/Tools/windows_x64/std/lua/_lua/_hx_anon.lua

@@ -33,8 +33,8 @@ local function _hx_new(prototype)
 end
 
 function _hx_field_arr(obj)
-    res = {}
-    idx = 0
+    local res = {}
+    local idx = 0
     if obj.__fields__ ~= nil then
         obj = obj.__fields__
     end

Kha/Tools/windows_x64/std/lua/_lua/_hx_bit.lua

@@ -1,16 +1,21 @@
--- require this for lua 5.1
-pcall(require, 'bit')
-if bit then
-  _hx_bit_raw = bit
-  _hx_bit = setmetatable({}, { __index = _hx_bit_raw });
-else
-  _hx_bit_raw = _G.require('bit32')
-  _hx_bit = setmetatable({}, { __index = _hx_bit_raw });
+local hasBit32, bit32 = pcall(require, 'bit32')
+if hasBit32 then --if we are on Lua 5.1, bit32 will be the default.
+  _hx_bit_raw = bit32
+  _hx_bit = setmetatable({}, { __index = _hx_bit_raw })
   -- lua 5.2 weirdness
-  _hx_bit.bnot = function(...) return _hx_bit_clamp(_hx_bit_raw.bnot(...)) end;
-  _hx_bit.bxor = function(...) return _hx_bit_clamp(_hx_bit_raw.bxor(...)) end;
+  _hx_bit.bnot = function(...) return _hx_bit_clamp(_hx_bit_raw.bnot(...)) end
+  _hx_bit.bxor = function(...) return _hx_bit_clamp(_hx_bit_raw.bxor(...)) end
+else
+  --If we do not have bit32, fallback to 'bit'
+  local hasBit, bit = pcall(require, 'bit')
+  if not hasBit then
+    error("Failed to load bit or bit32")
+  end
+  _hx_bit_raw = bit
+  _hx_bit = setmetatable({}, { __index = _hx_bit_raw })
 end
+
 -- see https://github.com/HaxeFoundation/haxe/issues/8849
-_hx_bit.bor = function(...) return _hx_bit_clamp(_hx_bit_raw.bor(...)) end;
-_hx_bit.band = function(...) return _hx_bit_clamp(_hx_bit_raw.band(...)) end;
-_hx_bit.arshift = function(...) return _hx_bit_clamp(_hx_bit_raw.arshift(...)) end;
+_hx_bit.bor = function(...) return _hx_bit_clamp(_hx_bit_raw.bor(...)) end
+_hx_bit.band = function(...) return _hx_bit_clamp(_hx_bit_raw.band(...)) end
+_hx_bit.arshift = function(...) return _hx_bit_clamp(_hx_bit_raw.arshift(...)) end

Kha/Tools/windows_x64/std/lua/_lua/_hx_handle_error.lua

@@ -0,0 +1,8 @@
+function _hx_handle_error(obj)
+  local message = tostring(obj)
+  if _G.debug and _G.debug.traceback then
+    -- level 2 to skip _hx_handle_error
+    message = _G.debug.traceback(message, 2)
+  end
+  return setmetatable({}, { __tostring = function() return message end })
+end

Kha/Tools/windows_x64/std/lua/_lua/_hx_luv.lua

@@ -0,0 +1,8 @@
+if package.loaded.luv then
+  _hx_luv = _G.require("luv");
+else
+  _hx_luv = {
+    run=function(mode) return false end,
+    loop_alive=function() return false end
+  }
+end

Kha/Tools/windows_x64/std/lua/_lua/_hx_tostring.lua

@@ -99,16 +99,3 @@ function _hx_tostring(obj, depth)
         return ""
     end
 end
-
-function _hx_error(obj)
-    if obj.value then
-        _G.print("runtime error:\n " .. _hx_tostring(obj.value));
-    else
-        _G.print("runtime error:\n " .. tostring(obj));
-    end
-
-    if _G.debug and _G.debug.traceback then
-        _G.print(debug.traceback());
-    end
-end
-