REPL not sufficiently isolated from class artifacts in current directory

[som-snytt]

Compiler version

3.0.0

Minimized code

➜  snips scala oq.scala
2
0
➜  snips
➜  snips scalac -version
Scala compiler version 3.0.0 -- Copyright 2002-2021, LAMP/EPFL
➜  snips rm *.class *.tasty
➜  snips scala oq.scala
2
2

Output

This should never happen:

➜  snips vi hi.scala
➜  snips cat hi.scala

@main def test() = println("hello, world")
➜  snips scala hi.scala
hello, world
➜  snips scalac hi.scala
➜  snips vi hi.scala
➜  snips scala hi.scala
hello, world
➜  snips cat hi.scala

@main def test() = println("goodbye, cruel world")
➜  snips

Expectation

Running a script or interactive REPL actually runs the source text.

This is a follow-up to #7635 which was improperly closed.

Noticed again at https://gitter.im/scala/scala?at=60a9b889850bfa2d3bdaae09

[bjornregnell]

See also:
https://gitter.im/scala/scala?at=60ba844621d6d00b1fb4fb3f
The error on util.Random not being seen was because I just happened to have a sub-folder named util...

[SethTisue]

This bit somebody again today: https://contributors.scala-lang.org/t/type-of-an-anonymous-class-derivation/5431/5 cc @tpolecat

It routinely bites veterans as well as beginners.

I'm re-adding the "area:repl" label, since I'm certain the REPL is affected.

[som-snytt]

I just read the contributors thread, very funny! or sad! or one of those things! OOTT is that even a thing.

As in the OP "this should never happen". Also we should never waste the time of major contributors. We tend to focus on the "newbie experience".

[SethTisue]

did somebody work on this at the spree today?

[griggt]

I had originally signed up to work on it but was reassigned to a different issue.

[som-snytt]

I finished the bedroom flooring today and next I have to look again at the f-interpolator. But I'd still be willing to put my money where my mouth is. I'll let you know when I come into some cash.

[bjornregnell]

@som-snytt Beware of insufficient bedroom floor isolation and spurious artifacts in the same place. Cash is king.

[SethTisue]

Note that #12607 includes @Ignored tests for this