partest of empty dir

[som-snytt]

Problem

An empty pos dir passes, an empty run dir crashes where

last test / IntegrationTest / testOnly

shows

[error] Uncaught exception when running partest: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Error running .../scala/test/files/run/ZZZZ
[scroll way down]
[error] Caused by: sbt.ForkMain$ForkError: java.nio.file.NoSuchFileException: .../scala/test/files/run/ZZZZ-run.log

I was going to make ZZZZ.scala into ZZZZ/*.scala, changed my mind. It takes the empty dir and ignores the ZZZZ.scala, but really if it decides it has nothing to compile, it should fail the test instead of either passing or crashing.

Someday, when Scala 3 seeks to re-integrate partest, they'll say, "It even fails nicely on an empty test directory."

[som-snytt]

I forgot there is no internal label for tickets, which would otherwise go to scala-dev.

[SethTisue]

"build" is close enough, but I agree the scala/bug vs scala-dev choice is unclear 🤷

[som-snytt]

Thanks, I'd didn't see build because I was still blinded by rage. That label works nicely, as it is build-time.