From b3f224b2801059bf6b2d1b4001ffd8d34c91d19e Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 3 Sep 2014 00:56:31 +0200
Subject: [PATCH] runtime: handle empty environment variables on Plan 9

LGTM=bradfitz, rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/137920044
---
 src/pkg/runtime/env_plan9.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/pkg/runtime/env_plan9.go b/src/pkg/runtime/env_plan9.go
index b6dcb4c1ea..76e9867e03 100644
--- a/src/pkg/runtime/env_plan9.go
+++ b/src/pkg/runtime/env_plan9.go
@@ -31,6 +31,10 @@ func gogetenv(key string) string {
 		return ""
 	}
 	n := seek(fd, 0, 2) - 1
+	if n <= 0 {
+		close(fd)
+		return ""
+	}
 
 	p := make([]byte, n)
 
-- 
2.48.1