PowerShell doesn't print a new line on exit

Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest released version
• Search the existing issues.
• Refer to the FAQ.
• Refer to Differences between Windows PowerShell 5.1 and PowerShell.

Steps to reproduce

1. Start PowerShell on Unix
2. Press ^D

Expected behavior

mcroce@t490s:~$ pwsh
PowerShell 7.2.0
Copyright (c) Microsoft Corporation.

https://aka.ms/powershell
Type 'help' to get help.

PS /home/mcroce>
mcroce@t490s:~$

Actual behavior

mcroce@t490s:~$ pwsh
PowerShell 7.2.0
Copyright (c) Microsoft Corporation.

https://aka.ms/powershell
Type 'help' to get help.

PS /home/mcroce> mcroce@t490s:~$ 

Error details

No response

Environment data

Name                           Value
----                           -----
PSVersion                      7.2.0
PSEdition                      Core
GitCommitId                    7.2.0
OS                             Linux 5.15.0 #47 SMP Tue Nov 2 23:55:47 CET 2021
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visuals

No response

[jhoneill]

if you are using

 Set-PSReadLineKeyHandler -Chord 'Ctrl+d' -ScriptBlock { [System.Environment]::Exit(0) } 

you can make it

 Set-PSReadLineKeyHandler -Chord 'Ctrl+d' -ScriptBlock { ' ' ;  [System.Environment]::Exit(0) }

to output an empty line firest (there is no need for a space between the quotes, you can put any text ‘exiting’ or a an empty string, or even $null there.)

Because PSReadline is responsible for handling (and changing or acting on) commands as typed but before they are submitted it won’t insert a new line, and if you type EXIT [enter] you already have a new line. Exit is immediate exit and if it suffixed lines to output that would change the results of existing code which uses exit, so it would be a breaking change.

As explained elsewhere #16256 ctrl-D isn’t a shortcut key but the end of file marker; different OSes use different characters (ctrl Z gets you out of windows’ nslookup, but ctrl D gets you out of the unix/linux version) and not all shells see input as a continuous file stream.

[teknoraver]

I just retried with a fresh build, and now ^D doesn’t even terminates the shell. This is the strace log:

mcroce@mcroce-ubuntu18:~$ sudo strace -p 16084
strace: Process 16084 attached
read(0, "\4", 1024)                     = 1
futex(0x7f35c40d28b0, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7f35c40d2860, FUTEX_WAKE_PRIVATE, 1) = 1
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 8, 0xac000) = 0x7f76ff696000
munmap(0x7f76ff696000, 4096)            = 0
read(0, "\4", 1024)                     = 1
read(0, "\4", 1024)                     = 1
read(0, "\4", 1024)                     = 1
read(0, 

What has been changed?