merge-modules pass crashed

Hi, I wanted to use elm-reduce to create a SSCCE for a bug I found in the 0.19.1-alpha-2 compiler. After running elm-reduce for a few minutes I got an error.

The error message was:

Failed to parse module at ".\\vendored-libs\\\\mdgriffith\\\\elm-ui\\\\1.1.0\\\\src\\Element\\Input.elm" due to the errors above.
CallStack (from HasCallStack):
  error, called at src\Language\Elm.hs:223:13 in elm-reduce-1.0.0.0-A40A70JsBu6I8CyJX6eCJx:Language.Elm

Additional info: The elm-reduce-script which elm-reduce calls is a C# program. Here's the source code for that

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace elm_reduce_script
{
    class Program
    {
        static void Main(string[] args)
        {
            Environment.CurrentDirectory = @"C:\Users\Martin\hackman";
            try
            {
                Directory.Delete("elm-stuff", true);
            }
            catch
            {
            }

            var elmJson = "elm.json";
            var text = File.ReadAllText(elmJson);
            File.WriteAllText(elmJson, text.Replace("0.19.0", "0.19.1"));

            Process.Start("elm-0.19.1-alpha-2-windows.exe", "make src/Main.elm");

            System.Diagnostics.Process process = new System.Diagnostics.Process();
            System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
            startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            startInfo.FileName = "elm-0.19.1-alpha-2-windows.exe";
            startInfo.Arguments = "make src/Main.elm";
            process.StartInfo = startInfo;
            process.StartInfo.UseShellExecute = false;
            startInfo.RedirectStandardOutput = true;
            startInfo.RedirectStandardError = true;

            process.Start();

            process.WaitForExit();

            var data = process.StandardError.ReadToEnd();

            var text2 = File.ReadAllText(elmJson);
            File.WriteAllText(elmJson, text2.Replace("0.19.1", "0.19.0"));

            if (data.Contains("thread blocked indefinitely in an MVar operation"))
            {
                Environment.Exit(0);
            }
            Environment.Exit(1);
        }
    }
}

elm-reduce-bug-merge-modules-0.zip elm-reduce-bug-format-0.zip elm-reduce-bug-remove-dead-modules-0.zip