Expect.equal throws an NRE on failure

On Expecto 8.10.1, the following code in an F# script fails with an NRE rather than a “pretty” error.

open Expecto
Expect.equal 1 2 "Doh!"

with the error:

System.NullReferenceException: Object reference not set to an instance of an object.
   at Expecto.Expect.highlightAllGreen(FSharpList`1 diffs, String s) in C:\Users\Anthony Lloyd\src\expecto\Expecto\Expect.fs:line 45
   at Expecto.Expect.printVerses[a,b](String firstName, a first, String secondName, b second) in C:\Users\Anthony Lloyd\src\expecto\Expecto\Expect.fs:line 66
   at Expecto.Expect.equal$cont@317[a](a actual, a expected, String message, Object e, Object a, Unit unitVar) in C:\Users\Anthony Lloyd\src\expecto\Expecto\Expect.fs:line 335
   at <StartupCode$FSI_0014>.$FSI_0014.main@()
Stopped due to error

Is this something I’m doing “wrong” - can you not call Expect. functions directly in a script or something?

[haf]

Putting a check for Windows won’t help that at all I would imagine.

No, that’s separate; the change that fixed your problem was to default the colours setting to something other than null (None).

[AnthonyLloyd]

@isaacabraham Need to set --colours 0. They are ANSI control codes. No sensible way of detecting if they are not supported and we default to 8 colours.