From ba72820f7ab296425ceeb7b7a8d6f4e1795e3c11 Mon Sep 17 00:00:00 2001
From: Jaran Charumilind <jcharumilind@grailbio.com>
Date: Wed, 12 May 2021 14:59:11 -0700
Subject: [PATCH] Exclude (*Pipe{Read,Write}r).CloseWithError

---
 errcheck/errcheck.go | 4 ++++
 testdata/main.go     | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/errcheck/errcheck.go b/errcheck/errcheck.go
index 724e3e8..7697048 100644
--- a/errcheck/errcheck.go
+++ b/errcheck/errcheck.go
@@ -51,6 +51,10 @@ var (
 		"fmt.Fprintf(os.Stderr)",
 		"fmt.Fprintln(os.Stderr)",
 
+		// io
+		"(*io.PipeReader).CloseWithError",
+		"(*io.PipeWriter).CloseWithError",
+
 		// math/rand
 		"math/rand.Read",
 		"(*math/rand.Rand).Read",
diff --git a/testdata/main.go b/testdata/main.go
index 48d2c3b..44d4ac4 100644
--- a/testdata/main.go
+++ b/testdata/main.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"crypto/sha256"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"math/rand"
 	mrand "math/rand"
@@ -147,6 +148,9 @@ func main() {
 	rand.Read(nil)
 	mrand.Read(nil)
 	sha256.New().Write([]byte{})
+	pr, pw := io.Pipe()
+	pr.CloseWithError(nil)
+	pw.CloseWithError(nil)
 
 	ioutil.ReadFile("main.go") // UNCHECKED