1 files changed, 17 insertions, 1 deletions

diff --git a/src/ltm.js b/src/ltm.js
index f163f44..6186066 100644
--- a/src/ltm.js
+++ b/src/ltm.js
@@ -9,6 +9,8 @@ const Table   = lobject.Table;
 const ldo     = require('./ldo.js');
 const lstate  = require('./lstate.js');
 const lua     = require('./lua.js');
+const ldebug  = require('./ldebug.js');
+const lvm     = require('./lvm.js');
 const CT      = lua.constant_types;
 
 
@@ -114,7 +116,21 @@ const luaT_callbinTM = function(L, p1, p2, res, event) {
 
 const luaT_trybinTM = function(L, p1, p2, res, event) {
     if (!luaT_callbinTM(L, p1, p2, res, event)) {
-        throw new Error("TM error"); // TODO: luaG_error
+        switch (event) {
+            case TMS.TM_CONCAT:
+                ldebug.luaG_concaterror(L, p1, p2);
+            case TMS.TM_BAND: case TMS.TM_BOR: case TMS.TM_BXOR:
+            case TMS.TM_SHL: case TMS.TM_SHR: case TMS.TM_BNOT: {
+                let n1 = lvm.tonumber(p1);
+                let n2 = lvm.tonumber(p2);
+                if (n1 !== false && n2 !== false)
+                    ldebug.luaG_tointerror(L, p1, p2);
+                else
+                    ldebug.luaG_opinterror(L, p1, p2, "perform bitwise operation on");
+            }
+            default:
+                ldebug.luaG_opinterror(L, p1, p2, "perform arithmetic on");
+        }
     }
 };