Conditional Breakpoint query does not work in pipeline ($_ not recognized)

Bắt đầu bằng cách tái hiện hành vi của breakpoint có điều kiện trong Visual Studio Code với extension PowerShell, đồng thời so sánh vòng lặp foreach với ví dụ pipeline ForEach-Object trong issue. Theo dõi entry point xử lý breakpoint có điều kiện và xác minh rằng $_ -eq 5 dừng việc thực thi trong trường hợp pipeline mà không làm hỏng hành vi hiện có của $number -eq 100.

Prerequisites

• I have written a descriptive issue title.
• I have searched all open and closed issues to ensure it has not already been reported.
• I have read the troubleshooting guide.
• I am sure this issue is with the extension itself and does not reproduce in a standalone PowerShell instance.
• I have verified that I am using the latest version of Visual Studio Code and the PowerShell extension.
• If this is a security issue, I have read the security issue reporting guidance.

Summary

Hi there,

During PSConfEU there was a demo about VSCode and I was following along and I realized that for conditional breakpoints there seems to be a bug where $_ would not be recognized in the queries. If I would use the conditional breakpoint in a foreach loop (keyword) it would work no problem with the loop variable. The issue as far as I can see only exist in Foreach-Object within the pipeline.

PowerShell Version

PS /Users/kevinbates/Code/PSConf25> $PSVersionTable; $host 

Name                           Value
----                           -----
PSVersion                      7.4.6
PSEdition                      Core
GitCommitId                    7.4.6
OS                             Darwin 24.5.0 Darwin Kernel Version 24.5.0: Tue Apr 22 19:54:25 PDT 2025; root:xnu-11417.121.6~2/RELEASE_ARM64_T6020
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Name             : Visual Studio Code Host
Version          : 2025.0.0
InstanceId       : 4c1c07d9-cbf8-40b2-8f41-6c2866edb05b
UI               : System.Management.Automation.Internal.Host.InternalHostUserInterface
CurrentCulture   : en-US
CurrentUICulture : en-US
PrivateData      : Microsoft.PowerShell.ConsoleHost+ConsoleColorProxy
DebuggerEnabled  : True
IsRunspacePushed : False
Runspace         : System.Management.Automation.Runspaces.LocalRunspace

Visual Studio Code Version

PS /Users/kevinbates/Code/PSConf25> code --version
1.100.3
258e40fedc6cb8edf399a463ce3a9d32e7e1f6f3
arm64

Extension Version

PS /Users/kevinbates/Code/PSConf25> code --list-extensions --show-versions | select-string powershell

ms-vscode.powershell@2025.0.0

Steps to Reproduce

I can run this piece of code:

$numbers = 1..100

foreach($number in $numbers){
    write-host $number
}

with the following conditional breakpoint on the line within the loop:

$number -eq 100

And the breakpoint will hit as expected. If I change up my code to use Foreach-Object. It will no longer hit.

1..100 | ForEach-Object {
    write-host $_
}

with the following expression:

$_ -eq 5

Visuals

No response

Logs

No response