[Bug] Setctty set but Ctty not valid in child

[samuel-phan]

Description

With Golang 1.15, I faced this error when spawning a expect.NewExpect():

Setctty set but Ctty not valid in child

Suggested fix

The issue has been fixed in this PR: creack/pty#103

I think you should switch the pty lib from:

"github.com/kr/pty"

to:

"github.com/creack/pty"

Workaround

I forced the requirement in my go.mod:

require (
	github.com/creack/pty v1.1.11
)