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os: ReadDir(\\.\pipe\) fails with go1.21 on Windows #61918

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qmuntal opened this issue Aug 10, 2023 · 4 comments
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os: ReadDir(\\.\pipe\) fails with go1.21 on Windows #61918

qmuntal opened this issue Aug 10, 2023 · 4 comments
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@qmuntal
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NeedsFix The path to resolution is known, but the work has not been done. OS-Windows
Milestone
Go1.22

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@qmuntal
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qmuntal commented Aug 10, 2023

What version of Go are you using (go version)?

$ go version
go version go1.21.0 windows/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\***\AppData\Local\go-build
set GOENV=C:\Users\***\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\***\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\***\go
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Users\***\sdk\go1.21.0
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLCHAIN=auto
set GOTOOLDIR=C:\Users\***\sdk\go1.21.0\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.21.0
set GCCGO=gccgo
set GOAMD64=v1
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=C:\Users\***\code\gotest\go.mod
set GOWORK=
set CGO_CFLAGS=-O2 -g
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-O2 -g
set CGO_FFLAGS=-O2 -g
set CGO_LDFLAGS=-O2 -g
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=C:\Users\***\AppData\Local\Temp\go-build3463100184=/tmp/go-build -gno-record-gcc-switches

What did you do?

package main

import (
	"fmt"
	"os"
)

func main() {
	_, err := os.ReadDir(`\\.\pipe\`)
	if err != nil {
		fmt.Println("failed: ", err)
	} else {
		fmt.Println("succeeded")
	}
}

What did you expect to see?

succeeded

What did you see instead?

failed: readdir \\.\pipe\: The system cannot find the path specified.

It is important to note that this doesn't reproduce with go1.20.
Probably related to #61907.
@qmuntal qmuntal added OS-Windows NeedsFix The path to resolution is known, but the work has not been done. labels Aug 10, 2023
@qmuntal qmuntal self-assigned this Aug 10, 2023
@qmuntal qmuntal changed the title affected/package: os: ReadDir(\\.\pipe\) fails with go1.21 on Windows Aug 10, 2023
@qmuntal qmuntal changed the title os: ReadDir(\\.\pipe\) fails with go1.21 on Windows os: ReadDir(\\.\pipe\) fails with go1.21 on Windows Aug 10, 2023
@gopherbot
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Change https://go.dev/cl/518195 mentions this issue: os: support file systems without file IDs when reading directores on windows

@gopherbot
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gopherbot commented Aug 10, 2023 •
edited by qmuntal

Change https://go.dev/cl/518196 mentions this issue: [release-branch.go1.21] os: support file systems without file IDs when reading directories on windows

@bcmills bcmills added this to the Go1.22 milestone Aug 11, 2023
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bcmills commented Aug 11, 2023

@gopherbot, please backport to Go 1.21. This was a regression in a core library.

@gopherbot
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Backport issue(s) opened: #61964 (for 1.21).

Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://go.dev/wiki/MinorReleases.

@gopherbot gopherbot mentioned this issue Aug 11, 2023
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