[SR-10639] Connecting two `Process`es with `Pipe` crashes

[nikstar]

Previous ID	SR-10639
Radar	None
Original Reporter	@nikstar
Type	Bug
Status	Resolved
Resolution	Done

Environment

Ubuntu 18.04; Swift 5.0.1 release, same on swift-DEVELOPMENT-SNAPSHOT-2019-05-07-a-ubuntu18.04

Additional Detail from JIRA

Votes	0
Component/s	Foundation
Labels	Bug
Assignee	@spevans
Priority	Medium

md5: 1ad90002f690ee22118f79102bc6ecde

relates to:

• SR-11699 Calling closeFile() on standardInput Pipe before calling Process.run() aborts with EBADF on Linux

Issue Description:

Following code crashes on Linux:

import Foundation 

let ls = Process() 
ls.executableURL = URL(fileURLWithPath: "/bin/ls")
let cat = Process()
cat.executableURL = URL(fileURLWithPath: "/bin/cat")

let pipe = Pipe() 
ls.standardOutput = pipe
cat.standardInput = pipe

try! ls.run()
try! cat.run()
cat.waitUntilExit()

Console output:

Fatal error: POSIX command failed with error: 9 – EBADF: file /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-18_04/swift-corelibs-foundation/Foundation/Process.swift, line 977
 Illegal instruction (core dumped)

[spevans]

This should be fixed by #2553 which is also the fix for https://bugs.swift.org/browse/SR-11699

[spevans]

This has been merged into master and is fixed in swift-DEVELOPMENT-SNAPSHOT-2019-11-12-a-ubuntu18.04

$ ls
sr-10639.swift
$ cat sr-10639.swift 
import Foundation 

let ls = Process() 
ls.executableURL = URL(fileURLWithPath: "/bin/ls")
let cat = Process()
cat.executableURL = URL(fileURLWithPath: "/bin/cat")

let pipe = Pipe() 
ls.standardOutput = pipe
cat.standardInput = pipe

try! ls.run()
try! cat.run()
cat.waitUntilExit()

$ ~/swift-DEVELOPMENT-SNAPSHOT-2019-11-12-a-ubuntu18.04/usr/bin/swift sr-10639.swift 
sr-10639.swift