Get-Help cannot find about topics from Update-Help

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

Modules with about topics are unable to be found if the help is delivered via Update-Help.

Update-Help PSReadline
Get-Help about_PSReadline

Expected behavior

Shows about topic

Actual behavior

Get-Help about_PSReadline

Name                              Category  Module                    Synopsis
----                              --------  ------                    --------
Add-History                       Cmdlet    Microsoft.PowerShell.Core Appends entries to the session history.
Clear-History                     Cmdlet    Microsoft.PowerShell.Core Deletes entries from the PowerShell session comm…
Get-History                       Cmdlet    Microsoft.PowerShell.Core Gets a list of the commands entered during the c…
Invoke-History                    Cmdlet    Microsoft.PowerShell.Core Runs commands from the session history.
about_Functions_Argument_Complet… HelpFile
about_History                     HelpFile
about_Line_Editing                HelpFile
about_Pipelines                   HelpFile
about_Tab_Expansion               HelpFile

Error details

N/A

Environment data

$PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.3.0-rc.1
PSEdition                      Core
GitCommitId                    7.3.0-rc.1
OS                             Microsoft Windows 10.0.19044
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visuals

No response

[sdwheeler]

@ThomasNieto OK, I can reproduce this problem.

@adityapatwardhan This is the problem we discussed where help is not found for a module installed in the user scope unless you manually copy the help to the module folder.

[sdwheeler]

This is a bug in Get-Help. On my system I get the following output:

PS> get-help about_PSReadLine

Name                              Category  Module                    Synopsis
----                              --------  ------                    --------
about_psreadline                  HelpFile
about_PSReadLine                  HelpFile

The help system is seeing two files. I believe that one is from Windows PowerShell 5.1 and the other is the current version of help installed for PowerShell 7.x.