After reporting #1392 I figured I'd try to reproduce fsharp/fsharp-compiler-docs#586 again without using FSharp.Compiler.Service. And lo and behold here is how it works (or should I say fails):

Repro steps

test.fsx

#load "other.fsx"

Other.func()

and

other.fsx

let func = (fun () ->
    printfn "This shouldn't work"
) )

1. open fsi
2. #load test.fsx

Expected behavior

other.fsx(3,3): error FS0010: Unexpected symbol ')' in implementation file

Actual behavior

> #load "test.fsx";;
[Loading C:\PROJ\visualfsharp.issues\loadWithError\other.fsx
 Loading C:\PROJ\visualfsharp.issues\loadWithError\test.fsx]
This shouldn't work

namespace FSI_0003
  val func : unit -> unit


namespace FSI_0003

Known workarounds

No known workaround

Related information

• F# 4.0 (Microsoft (R) F# Interactive version 14.0.23413.0)
• Windows 10
• VS 2015

fsi.exe test.fsx works ie errors out as expected. That's why I initially assumed it would be an FSharp.Compiler.Service only bug. see fsharp/fsharp-compiler-docs#586