```
[warn] -- [E049] Reference Migration Warning: /home/runner/work/scopt/scopt/shared/src/test/scala/scopttest/Issue239.scala:9:8
[warn] 9 |        arg[Double]("value").action((v, _) => v)
[warn]   |        ^^^
[warn]   |Reference to arg is ambiguous,
[warn]   |it is both defined in method $anonfun
[warn]   |and inherited subsequently in anonymous class scopt.OptionParser[Double] {...}
[warn]   |
[warn]   | longer explanation available when compiling with `-explain`
[warn] -- [E049] Reference Migration Warning: /home/runner/work/scopt/scopt/shared/src/test/scala/scopttest/Issue239.scala:22:8
[warn] 22 |        arg[Int]("value").action((v, _) => v)
[warn]    |        ^^^
[warn]    |Reference to arg is ambiguous,
[warn]    |it is both defined in method $anonfun
[warn]    |and inherited subsequently in anonymous class scopt.OptionParser[Int] {...}
[warn]    |
[warn]    | longer explanation available when compiling with `-explain`
```