Script via STDIN does not exit with error code and does not stop correctly

Steps to reproduce

Link to a related Problem in GitLab: https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27830#note_564599211

Test.ps1:

$ErrorActionPreference = 'Stop'
just bogus
Write-Host 'hello'

Batch-Call (working correctly with file)

pwsh -File Test.ps1

Exit-Code: 1

Batch-Call (working correctly with stdin)

type Test.ps1 | pwsh -noprofile -noninteractive -command "$input | iex"

Exit-Code: 1

Batch-Call (not working correctly with stdin)

type Test.ps1 | pwsh -Command -

Exit-Code: 0

Expected behavior

Powershell quits with non zero exit code and does not print "hello", but an exception for "just bogus"

Actual behavior

Powershell does execute all statement even though $ErrorActionPreference is set to "stop"

[Scordo]

Found out, that with 2 linebreaks behind the command it is working:

& {
    $ErrorActionPreference = 'Stop'
    just bogus
    Write-Host 'hello'
}

Just 2 empty lines behind the closing bracket and it is working.

The other working one is:

$pwshcode = {
    $ErrorActionPreference = 'Stop'
    just bogus
    Write-Host 'hello'
}

& $pwshcode

[jborean93]

I wouldn’t say it’s completely unusable there are workarounds that make this entirely possible. The method I usually use is this

docker run \
  --rm \
  --interactive \
  mcr.microsoft.com/powershell pwsh -Command - << 'EOF'
& {
    if ($true) {
        echo "hi"
    }
}

EOF

Basically make sure there is an empty line between `}` and `EOF` so the input is accepted by pwsh and also put all your code inside a `&{}` block to ensure it is run as 1 script rather than the line by line parser that is the standard console input code.