From 1e477e648795e7c93460ae420eb541a15361b780 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Mon, 27 Aug 2012 14:26:50 +0200
Subject: [PATCH] Fix underflow handling in builtin string to number
 conversion.

---
 src/lj_strscan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lj_strscan.c b/src/lj_strscan.c
index 31189ae7..1e4b235c 100644
--- a/src/lj_strscan.c
+++ b/src/lj_strscan.c
@@ -266,7 +266,7 @@ static StrScanFmt strscan_dec(const uint8_t *p, TValue *o,
 
     /* Handle simple overflow/underflow. */
     if (idig > 310/2) { if (neg) setminfV(o); else setpinfV(o); return fmt; }
-    else if (idig < -326/2) { o->n = 0.0; return fmt; }
+    else if (idig < -326/2) { o->n = neg ? -0.0 : 0.0; return fmt; }
 
     /* Scale up until we have at least 17 or 18 integer part digits. */
     while (idig < 9 && idig < DLEN(lo, hi)) {