BUG pretty not working on Windows: "invalid character" about prettyprinter HOT 4 OPEN

Here seems to be workaround that can probably be implemented in programs and libraries (rather than by the end user).

from prettyprinter.

What happens if you just input "hello λ"?

Did you configure your terminal to use UTF-8?

from prettyprinter.

I looks like UTF-8 generally work in PS and CMD. In GHCI it get's escaped (but no error):

PS C:\Users\user> "hello ?"
hello λ
PS C:\Users\user> ghci
GHCi, version 9.2.5: https://www.haskell.org/ghc/  :? for help
ghci> "hello λ"
"hello \955"

I know other people having this issue on windows, it therefore seems not to be a isolated problem with my system.

from prettyprinter.

I found a workaround by changing the codepage of the PowerShell or cmd.exe: chcp 65001

(this link may be also useful)

from prettyprinter.