Note: -STA and -MTA are not supported in Core, but for consistency with Windows PowerShell, they should still be recognized, and either an error or a warning should be reported.

Here you can see that checking for -STA and -MTA is simply bypassed in Core.

Steps to reproduce

powershell -sta

Expected behavior

An error or a warning about how -STA and -MTA are not supported in PowerShell Core.

Actual behavior

-sta is misinterpreted as an (implied) -File parameter value; an error message is reported, and the session is exited.

The argument '-sta' to the -File parameter does not exist. Provide the path to an existing '.ps1' file as an argument to the -File parameter.

Environment data

PowerShell Core v6.0.0-beta.4 on macOS 10.12.5
PowerShell Core v6.0.0-beta.4 on Ubuntu 16.04.2 LTS
PowerShell Core v6.0.0-beta.4 on Microsoft Windows 10 Pro (64-bit; v10.0.15063)