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-rw-r--r--src/lobject.js4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/lobject.js b/src/lobject.js
index db76cb5..44d8c9b 100644
--- a/src/lobject.js
+++ b/src/lobject.js
@@ -7,6 +7,7 @@ const defs = require('./defs.js');
const ljstype = require('./ljstype.js');
const ldebug = require('./ldebug.js');
const ldo = require('./ldo.js');
+const lfunc = require('./lfunc.js');
const lstate = require('./lstate.js');
const lstring = require('./lstring.js');
const ltable = require('./ltable.js');
@@ -577,7 +578,8 @@ const luaO_pushvfstring = function(L, fmt, argp) {
v instanceof ltable.Table ||
v instanceof Udata ||
v instanceof LClosure ||
- v instanceof CClosure) {
+ v instanceof CClosure ||
+ v instanceof lfunc.UpVal) {
pushstr(L, defs.to_luastring("0x"+v.id.toString(16)));
} else {
/* user provided object. no id available */