From 89e4a76a812499cc108bb77fb5c9ae1877123df6 Mon Sep 17 00:00:00 2001
From: Benoit Giannangeli <giann008@gmail.com>
Date: Mon, 10 Apr 2017 13:20:08 +0200
Subject: Handle -0

---
 src/lstrlib.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lstrlib.js b/src/lstrlib.js
index 81b754d..f4f254f 100644
--- a/src/lstrlib.js
+++ b/src/lstrlib.js
@@ -106,7 +106,10 @@ const num2straux = function(x) {
         return sprintf(luaconf.LUA_NUMBER_FMT, x).split('').map(e => e.charCodeAt(0));
     else if (x === 0) {  /* can be -0... */
         /* create "0" or "-0" followed by exponent */
-        return sprintf(luaconf.LUA_NUMBER_FMT + "x0p+0", x).split('').map(e => e.charCodeAt(0));
+        let zero = sprintf(luaconf.LUA_NUMBER_FMT + "x0p+0", x).split('').map(e => e.charCodeAt(0));
+        if (Object.is(x, -0))
+            return [char['-']].concat(zero);
+        return zero;
     } else {
         let fe = lobject.frexp(x);  /* 'x' fraction and exponent */
         let m = fe[0];
-- 
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