From a208368398b02085d3b3dd31090097f0cd5bdf79 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Thu, 2 Nov 2017 16:33:14 -0700
Subject: [PATCH] Port fix for array index out of bounds in decimal conversion

https://github.com/miloyip/dtoa-benchmark/issues/7

commit fe550f38669fe0f488926c1ef0feb6c101f586d6
Author: Eli Fidler <efidler@topologyinc.com>
Date:   Tue May 31 11:51:37 2016 -0400

    avoid array index out-of-bounds

    UBSAN gave "runtime error: index 13 out of bounds for type 'const uint32_t [10]'"
---
 milo/dtoa_milo.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/milo/dtoa_milo.h b/milo/dtoa_milo.h
index d6821ed95..02c8c0849 100644
--- a/milo/dtoa_milo.h
+++ b/milo/dtoa_milo.h
@@ -284,7 +284,8 @@ inline void DigitGen(const DiyFp& W, const DiyFp& Mp, uint64_t delta, std::strin
 		kappa--;
 		if (p2 < delta) {
 			*K += kappa;
-			GrisuRound(buffer, *len, delta, p2, one.f, wp_w.f * kPow10[-kappa]);
+			int index = -static_cast<int>(kappa);
+			GrisuRound(buffer, *len, delta, p2, one.f, wp_w.f * (index < 9 ? kPow10[-static_cast<int>(kappa)] : 0));
 			return;
 		}
 	}