Scala script runner puts cwd ahead of script artifacts on runtime classpath

[som-snytt]

Compiler version

3.3.0

Minimized code

import java.util.concurrent.Callable

class C extends Callable[C] {
  def call(): C = this
}

@main def test() = println(C())

Output

➜  snips scalac -d /tmp/sandbox callable.scala
➜  snips scala -cp /tmp/sandbox test
C@516be40f
➜  snips scala callable.scala
java.lang.NoSuchMethodError: C: method 'void <init>()' not found
        at callable$package$.test(callable.scala:7)
        at test.main(callable.scala:7)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:578)
        at dotty.tools.scripting.ScriptingDriver.compileAndRun(ScriptingDriver.scala:33)
        at dotty.tools.scripting.Main$.process(Main.scala:45)
        at dotty.tools.MainGenericRunner$.run$1(MainGenericRunner.scala:250)
        at dotty.tools.MainGenericRunner$.process(MainGenericRunner.scala:270)
        at dotty.tools.MainGenericRunner$.main(MainGenericRunner.scala:281)
        at dotty.tools.MainGenericRunner.main(MainGenericRunner.scala)

Expectation

I expect the scala command to offer a mere convenience over running scalac && scala, and to avoid differences of semantics, let alone run into bugs.

[bishabosha]

mine works with cs,
e.g. cs launch org.scala-lang:scala3-compiler_3:3.3.0 -M dotty.tools.MainGenericRunner -- -usejavacp foo.scala

[som-snytt]

I was awake when I tried this? There was a stray C.class from the day before in the current directory, which was my "junk drawer" of snippets.

The class produced by compilation should "obviously" take precedence.

In my transcript, it's visible that I've switched to dumping test class files in /tmp/sandbox (and not just /tmp) to avoid this issue and also the hassle of deleting files manually.

I wonder if adding -cp /dev/null to a command alias would suffice. Actually, incredibly, specifying a classpath (that does not include cwd) does not avoid the problem