From 0934940f4e2a41823546ba6e0657c49ba49219f4 Mon Sep 17 00:00:00 2001
From: James Hartig <fastest963@gmail.com>
Date: Fri, 26 Oct 2018 15:13:40 -0400
Subject: [PATCH] testutil: If testing.T is nil panic with error (#4725)

---
 testutil/io.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/testutil/io.go b/testutil/io.go
index 7d0ca6effc..77041d47d8 100644
--- a/testutil/io.go
+++ b/testutil/io.go
@@ -39,6 +39,9 @@ func TempDir(t *testing.T, name string) string {
 	name = strings.Replace(name, "/", "_", -1)
 	d, err := ioutil.TempDir(tmpdir, name)
 	if err != nil {
+		if t == nil {
+			panic(err)
+		}
 		t.Fatalf("err: %s", err)
 	}
 	return d
@@ -55,6 +58,9 @@ func TempFile(t *testing.T, name string) *os.File {
 	}
 	f, err := ioutil.TempFile(tmpdir, name)
 	if err != nil {
+		if t == nil {
+			panic(err)
+		}
 		t.Fatalf("err: %s", err)
 	}
 	return f