I cannot start PowerShell.exe interactively in the Cygwin rxvt or mintty terminal. Seems like some kind of session using / dev / tty? or / dev / pts? pseudo-terminal device. Instance using a junky windows console device / dev / console or / dev / cons? will work.
cygstart /bin/bash -li
runs the console version on a rough Windows command prompt, which is the only place I can get interactive PowerShell.

Working. Rxvt doesnt:

Doesn't mint:

I tried everything echo -e | powershell.exeandpowershell.exe </dev/null
I assume that when I see the answers on Stackoverflow, they use the console ... or am I missing something?
PowerShell 2 Cygwin?, , , powershell v3, v2... , .
powershell powershell Cygwin, ( no script , ). . https://bitbucket.org/jbianchi/powershell/wiki/ script. powershell.exe "she-bang", ps1 script.