Failed nightly test with Java 11

[nicolasstucki]

Nightly build failed tests/run/context-functions.scala with Java 11.

https://dotty-ci.epfl.ch/lampepfl/dotty/4916/1/7

Restarted test: https://dotty-ci.epfl.ch/lampepfl/dotty/4918

[nicolasstucki]

@anatoliykmetyuk this might be a blocker for #8496

[nicolasstucki]

Actually it first failed in https://dotty-ci.epfl.ch/lampepfl/dotty/4798

[smarter]

probably caused by #8452. Not sure what's going on but I don't really understand why a mini-phase is a better fix than not doing an expansion when the expected type of an implicit function type is the same function type.

[anatoliykmetyuk]

Actually it first failed in https://dotty-ci.epfl.ch/lampepfl/dotty/4798

Yeah, no nightlies have been published since 6th March: https://repo1.maven.org/maven2/ch/epfl/lamp/dotty-compiler_0.23/

[anatoliykmetyuk]

It seems that it is caused by #8386. The failing test in question was added in that PR and was failing on Java 11 from the very time it was introduced. The first commit where testCompilation context-functions fails under Java 11 is cbd21a0.

/cc @odersky

[smarter]

Note that the this test runs correctly under Java 11 with a nightly from before #8386 so it is a regression.

[anatoliykmetyuk]

This test did not exist before #8386, it never worked under Java 11. If you run it manually before #8386 though, it does work properly.

[smarter]

If you run it manually before #8386 though, it does work properly.

Yes, that's what I meant.