From 5833c96b0a3b1e77b787ee9b908456a7334f7821 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Thu, 21 Feb 2013 13:30:31 -0500
Subject: [PATCH] runtime: better error from TestGcSys when gc is disabled

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7390047
---
 src/pkg/runtime/gc_test.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/pkg/runtime/gc_test.go b/src/pkg/runtime/gc_test.go
index 283a6812e9..0215ff2cf4 100644
--- a/src/pkg/runtime/gc_test.go
+++ b/src/pkg/runtime/gc_test.go
@@ -5,11 +5,15 @@
 package runtime_test
 
 import (
+	"os"
 	"runtime"
 	"testing"
 )
 
 func TestGcSys(t *testing.T) {
+	if os.Getenv("GOGC") == "off" {
+		t.Fatalf("GOGC=off in environment; test cannot pass")
+	}
 	defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(1))
 	memstats := new(runtime.MemStats)
 	runtime.GC()
-- 
2.48.1