Powershell runner ignores `-ErrorAction Ignore` parameter and thus script fails

Summary

In PowerShell scripts performed by CI in before_script section, the commands with -ErrorAction Ignore and -ErrorAction SilentlyContinue may fail despite the -ErrorAction value.

Piece of log:

$ Remove-Item $Env:CLONE_DIR -Recurse -ErrorAction Ignore
DEBUG:  194+  >>>> Remove-Item DirectoryThatDoesNotExist -Recurse -ErrorAction Ignore
DEBUG:  195+ if( >>>> !$?) { Exit $LASTEXITCODE }
DEBUG:  195+ if(!$?) {  >>>> Exit $LASTEXITCODE }

From PowerShell point of view, it's not a bug, because $? returns False regardless of ErrorAction value.

However, while my PS script doesn't fail when I run in on my PC, on CI job it does.

Steps to reproduce

1. Register a Windows CI runner with shell executor (powershell).
2. In before_script section of your build script, write the following:

   Remove-Item DirectoryThatDoesNotExist -Recurse -ErrorAction Ignore
   echo "Build didn't fail"

3. Observe the build failing on Remove-Item command.

What is the current bug behavior?

Executor checks the command result by checking $? value. This value doesn't take into account ErrorAction parameter

What is the expected correct behavior?

Executor checks the command result in a different way that takes into account ErrorAction parameter.

Environment

GitLab Enterprise Edition 12.0.0-ee

Windows Server 2016 (14393)

P.S.

Didn't try it anywhere outside of before_script.