From: Ken Thompson <ken@golang.org>
Date: Wed, 10 Dec 2008 21:28:46 +0000 (-0800)
Subject: string hash function faults w empty string
X-Git-Tag: weekly.2009-11-06~2539
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=e956429166632c68785a17be44b649ae6205bfb0;p=gostls13.git

string hash function faults w empty string
fixes maps[""]

R=r
OCL=20909
CL=20911
---

diff --git a/src/runtime/runtime.c b/src/runtime/runtime.c
index 3d0ee7f1e6..c075181a02 100644
--- a/src/runtime/runtime.c
+++ b/src/runtime/runtime.c
@@ -583,6 +583,8 @@ static uint64
 stringhash(uint32 s, string *a)
 {
 	USED(s);
+	if(*a == nil)
+		return memhash(emptystring->len, emptystring->str);
 	return memhash((*a)->len, (*a)->str);
 }