False positive warning: Unused import of a package

[OndrejSpanel]

Compiler version

3.7.0-RC1, 3.7.0-RC4

Minimized code

Main.scala:

package some.example
package demo

import some.example

object Main {

  def generic[T](x: Any): T = null.asInstanceOf[T]

  def main(args: Array[String]): Unit = {
    generic[example.Util](0)
  }
}

Util.scala:

package some.example

class Util

Output

unused import
import some.example

Expectation

The code does not compile without the import.

Note

The code does not make much sense, it can be fixed by using generic[Util](0) instead of generic[example.Util](0), but still, it probably should not create a false warning.

[Gedochao]

Last good release: 3.7.0-RC1-bin-20250127-89c20f8-NIGHTLY
First bad release: 3.7.0-RC1-bin-20250128-9cb97ec-NIGHTLY
c65d45d is the first bad commit (#20894)
cc @som-snytt

[som-snytt]

This will be a follow-up to recent #22987 where types "in some positions" are not processed.

Not to neglect to say, Thanks for the report, @OndrejSpanel !