varargs in main causes errors

[tcmulcahy]

I'm running Ammonite on Mac Ventura 13.4, Ammonite version:

$ amm --version
Ammonite REPL & Script-Runner, 2.5.11

Ammonite was installed via homebrew.

I'm able to use Ammonite just fine, until I try to use varargs in my main function (like documented here: https://ammonite.io/#ScriptArguments). Here's my minimal repro

$ cat /tmp/test
#!/usr/bin/env amm
// vi: filetype=scala

@main
def entrypoint(args: String*) = {
}

And here's the errors I get:

$ /tmp/test
Compiling /tmp/test
exception caught when loading class $: java.lang.AssertionError: assertion failed
-- Warning: /tmp/test:3:24 -----------------------------------------------------
3 |package $file.^.^.^.^.^.^.tmp
  |                        ^
  |The package name `^` will be encoded on the classpath, and can lead to undefined behaviour.
-- Warning: /tmp/test:3:22 -----------------------------------------------------
3 |package $file.^.^.^.^.^.^.tmp
  |                      ^
  |The package name `^` will be encoded on the classpath, and can lead to undefined behaviour.
-- Warning: /tmp/test:3:20 -----------------------------------------------------
3 |package $file.^.^.^.^.^.^.tmp
  |                    ^
  |The package name `^` will be encoded on the classpath, and can lead to undefined behaviour.
-- Warning: /tmp/test:3:18 -----------------------------------------------------
3 |package $file.^.^.^.^.^.^.tmp
  |                  ^
  |The package name `^` will be encoded on the classpath, and can lead to undefined behaviour.
-- Warning: /tmp/test:3:16 -----------------------------------------------------
3 |package $file.^.^.^.^.^.^.tmp
  |                ^
  |The package name `^` will be encoded on the classpath, and can lead to undefined behaviour.
-- Warning: /tmp/test:3:14 -----------------------------------------------------
3 |package $file.^.^.^.^.^.^.tmp
  |              ^
  |The package name `^` will be encoded on the classpath, and can lead to undefined behaviour.
-- [E007] Type Mismatch Error: /tmp/test:58:60 ---------------------------------
 58 |  def apply() = mainargs.ParserForMethods[$routesOuter.type]($routesOuter)
    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |                Found:    Seq[String]
    |                Required: String
    |---------------------------------------------------------------------------
    |Inline stack trace
    |- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    |This location contains code that was inlined from Macros.scala:120
    |- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    |This location contains code that was inlined from Macros.scala:120
     ---------------------------------------------------------------------------
    |
    | longer explanation available when compiling with `-explain`
Compilation Failed