SML-Bug.ps1

<#PSScriptInfo

.VERSION 1.0

.GUID dadcf7db-a1ab-4360-b66b-25d5e7a1666a

.AUTHOR skyler.soss@gmail.com

.COPYRIGHT Skye Soss 2024

.LICENSEURI https://opensource.org/license/mit

#>

<# 

.DESCRIPTION 
 Exhibiting unintended behavior in SML/NJ on Windows

#>

[CmdletBinding(PositionalBinding=$false)]
Param(
  [ValidateScript({Test-Path -Path $_ -PathType Container})]
  [string] $TempDir = $env:TEMP,

  [ValidateScript({Get-Command $_})]
  [string] $SMLCommand = "sml",

  [boolean] $Cleanup = $true
)

try {
  [Console]::OutputEncoding = [System.Text.Encoding]::UTF8
  $lambda = [char]::ConvertFromUtf32(0x03BB)
  $filename = "foo$lambda.sml"
  $filepath = Join-Path -Path $TempDir -ChildPath $filename

  'val () = print "Hello from SML\n"' | Out-File -Encoding ascii -FilePath $filepath
  $relfilepath = Resolve-Path -Relative $filepath
  Write-Host -ForegroundColor red "Testing SML with unicode .sml file ($SMLCommand $relfilepath)"
  & $SMLCommand $relfilepath

  Write-Host -ForegroundColor red "Testing SML to open unicode file (TextIO.openIn $filepath)"
  'hello' | Out-File -Encoding ascii -FilePath $filepath
  $smlscript = Join-Path -Path $TempDir -ChildPath "test.sml"
  @"
    val tmp = "$($TempDir -replace '\\', '\\')";
    val self = tmp ^ "\\test.sml";
    val f = TextIO.openIn self;
    val () = TextIO.print "Successfully opened self\n";
    val () = TextIO.closeIn f;
    val filename = tmp ^ "\\foo" ^ UTF8.encode 0wx03BB ^ ".sml";
    val () = TextIO.print ("Attempting to open \"" ^ filename ^ "\"\n");
    val f = TextIO.openIn filename;
    val () = TextIO.print "Success!\n";
    val () = TextIO.closeIn f;
    OS.Process.exit OS.Process.success : unit;
"@ | Out-File -Encoding ascii -FilePath $smlscript
  & $SMLCommand $smlscript
} finally {
  if ($Cleanup) {
    Remove-Item -Path $filepath
    Remove-Item -Path $smlscript
  }
}

SML-Bug.ps1.output.txt

PS C:\Users\skyle\Desktop> powershell .\SML-Bug.ps1 -TempDir .
Testing SML with unicode .sml file (sml .\fooλ.sml)

C:\Users\skyle\Desktop>REM sml.bat

C:\Users\skyle\Desktop>REM

C:\Users\skyle\Desktop>REM Copyright 2020 The Fellowship of SML/NJ (http://www.smlnj.org)

C:\Users\skyle\Desktop>REM All rights reserved.

C:\Users\skyle\Desktop>REM

C:\Users\skyle\Desktop>REM The standard driver for SML/NJ under the new runtime system

C:\Users\skyle\Desktop>REM
Standard ML of New Jersey (32-bit) v110.99.4 [built: Tue Aug 01 11:26:46 2023]
C:\Program Files (x86)\SMLNJ\\bin\.run\run.x86-win32.exe: Fatal error -- Uncaught exception InvalidArc with 0
 raised at Basis/Implementation/OS/os-path-fn.sml:47.62-47.72

Testing SML to open unicode file (TextIO.openIn .\fooλ.sml)

C:\Users\skyle\Desktop>REM sml.bat

C:\Users\skyle\Desktop>REM

C:\Users\skyle\Desktop>REM Copyright 2020 The Fellowship of SML/NJ (http://www.smlnj.org)

C:\Users\skyle\Desktop>REM All rights reserved.

C:\Users\skyle\Desktop>REM

C:\Users\skyle\Desktop>REM The standard driver for SML/NJ under the new runtime system

C:\Users\skyle\Desktop>REM
Standard ML of New Jersey (32-bit) v110.99.4 [built: Tue Aug 01 11:26:46 2023]
[opening .\test.sml]
val tmp = "." : string
val self = ".\\test.sml" : string
[autoloading]
[library $SMLNJ-BASIS/basis.cm is stable]
[library $SMLNJ-BASIS/(basis.cm):basis-common.cm is stable]
[autoloading done]
val f = - : TextIO.instream
Successfully opened self
[autoloading]
[library $SMLNJ-LIB/Util/smlnj-lib.cm is stable]
[autoloading done]
val filename = ".\\foo\206\187.sml" : string
Attempting to open ".\fooλ.sml"

uncaught exception Io [Io: openIn failed on ".\fooλ.sml", Win32TextPrimIO.openRd: failed]
  raised at: Basis/Implementation/IO/text-io-fn.sml:792.25-792.71